diff --git a/client/src/features/statistics/components/user/FavoriteReadingDaysChart.vue b/client/src/features/statistics/components/user/FavoriteReadingDaysChart.vue
index 38d13b4bc..0f31728b3 100644
--- a/client/src/features/statistics/components/user/FavoriteReadingDaysChart.vue
+++ b/client/src/features/statistics/components/user/FavoriteReadingDaysChart.vue
@@ -5,7 +5,7 @@ import { CalendarDays } from '@lucide/vue'
 import type { ReadingSessionSourceBucket } from '@bookorbit/types'
 
 import { useThemeStore } from '@/stores/theme'
-import { getBreakdownSeries, type BreakdownDimension } from '../../lib/breakdown'
+import { DEFAULT_BREAKDOWN_DIMENSION, getBreakdownSeries, type BreakdownDimension } from '../../lib/breakdown'
 import { useUserFavoriteReadingDays } from '../../composables/useUserFavoriteReadingDays'
 import BreakdownSelect from '../BreakdownSelect.vue'
 import ChartCard from '../ChartCard.vue'
@@ -22,7 +22,7 @@ const option = shallowRef({})
 const totalEvents = computed(() => data.value.reduce((sum, item) => sum + item.eventsCount, 0))
 const isEmpty = computed(() => totalEvents.value === 0)
 const lowConfidence = computed(() => totalEvents.value > 0 && totalEvents.value < MIN_EVENTS)
-const dimension = ref<BreakdownDimension>('source')
+const dimension = ref<BreakdownDimension>(DEFAULT_BREAKDOWN_DIMENSION)
 
 function weekdayOccurrencesInWindow(days: number): number[] {
   const counts = Array.from({ length: 7 }, () => 0)
diff --git a/client/src/features/statistics/components/user/PeakReadingHoursChart.vue b/client/src/features/statistics/components/user/PeakReadingHoursChart.vue
index 866a6b093..23d63133b 100644
--- a/client/src/features/statistics/components/user/PeakReadingHoursChart.vue
+++ b/client/src/features/statistics/components/user/PeakReadingHoursChart.vue
@@ -5,7 +5,7 @@ import { Clock3 } from '@lucide/vue'
 import type { ReadingSessionSourceBucket } from '@bookorbit/types'
 
 import { useThemeStore } from '@/stores/theme'
-import { getBreakdownSeries, type BreakdownDimension } from '../../lib/breakdown'
+import { DEFAULT_BREAKDOWN_DIMENSION, getBreakdownSeries, type BreakdownDimension } from '../../lib/breakdown'
 import { useUserPeakReadingHours } from '../../composables/useUserPeakReadingHours'
 import BreakdownSelect from '../BreakdownSelect.vue'
 import ChartCard from '../ChartCard.vue'
@@ -16,7 +16,7 @@ const MIN_EVENTS = 20
 const themeStore = useThemeStore()
 const { data, loading, error } = useUserPeakReadingHours()
 const option = shallowRef({})
-const dimension = ref<BreakdownDimension>('source')
+const dimension = ref<BreakdownDimension>(DEFAULT_BREAKDOWN_DIMENSION)
 
 const totalEvents = computed(() => data.value.reduce((sum, item) => sum + item.eventsCount, 0))
 const isEmpty = computed(() => totalEvents.value === 0)
diff --git a/client/src/features/statistics/components/user/ReadingClockChart.vue b/client/src/features/statistics/components/user/ReadingClockChart.vue
index d54e92027..c67646e6d 100644
--- a/client/src/features/statistics/components/user/ReadingClockChart.vue
+++ b/client/src/features/statistics/components/user/ReadingClockChart.vue
@@ -5,7 +5,7 @@ import { Clock } from '@lucide/vue'
 import type { ReadingSessionSourceBucket } from '@bookorbit/types'
 
 import { useThemeStore } from '@/stores/theme'
-import { getBreakdownSeries, type BreakdownDimension } from '../../lib/breakdown'
+import { DEFAULT_BREAKDOWN_DIMENSION, getBreakdownSeries, type BreakdownDimension } from '../../lib/breakdown'
 import { useUserPeakReadingHours } from '../../composables/useUserPeakReadingHours'
 import BreakdownSelect from '../BreakdownSelect.vue'
 import ChartCard from '../ChartCard.vue'
@@ -28,7 +28,7 @@ const option = shallowRef({})
 const totalEvents = computed(() => data.value.reduce((s, d) => s + d.eventsCount, 0))
 const isEmpty = computed(() => totalEvents.value === 0)
 const lowConfidence = computed(() => totalEvents.value > 0 && totalEvents.value < MIN_EVENTS)
-const dimension = ref<BreakdownDimension>('source')
+const dimension = ref<BreakdownDimension>(DEFAULT_BREAKDOWN_DIMENSION)
 
 function formatDuration(seconds: number): string {
   const total = Math.max(0, Math.floor(seconds))
diff --git a/client/src/features/statistics/components/user/ReadingPaceScatterChart.vue b/client/src/features/statistics/components/user/ReadingPaceScatterChart.vue
index 4a7bfc5a3..77d9edaae 100644
--- a/client/src/features/statistics/components/user/ReadingPaceScatterChart.vue
+++ b/client/src/features/statistics/components/user/ReadingPaceScatterChart.vue
@@ -4,7 +4,7 @@ import VChart from 'vue-echarts'
 import { Zap } from '@lucide/vue'
 
 import { useThemeStore } from '@/stores/theme'
-import { getBreakdownSeries, type BreakdownDimension } from '../../lib/breakdown'
+import { DEFAULT_BREAKDOWN_DIMENSION, getBreakdownSeries, type BreakdownDimension } from '../../lib/breakdown'
 import { useUserReadingPace } from '../../composables/useUserReadingPace'
 import BreakdownSelect from '../BreakdownSelect.vue'
 import ChartCard from '../ChartCard.vue'
@@ -19,7 +19,7 @@ const isEmpty = computed(() => data.value.length === 0)
 const hasEnoughData = computed(() => data.value.length >= MIN_SESSIONS)
 
 const option = shallowRef({})
-const dimension = ref<BreakdownDimension>('source')
+const dimension = ref<BreakdownDimension>(DEFAULT_BREAKDOWN_DIMENSION)
 
 watchEffect(() => {
   option.value = {}
diff --git a/client/src/features/statistics/components/user/ReadingSessionTimelineChart.vue b/client/src/features/statistics/components/user/ReadingSessionTimelineChart.vue
index 2307cc9c9..0fbb0296f 100644
--- a/client/src/features/statistics/components/user/ReadingSessionTimelineChart.vue
+++ b/client/src/features/statistics/components/user/ReadingSessionTimelineChart.vue
@@ -8,7 +8,13 @@ import { READING_SESSION_SOURCE_BUCKET_LABELS } from '@bookorbit/types'
 
 import { useThemeStore } from '@/stores/theme'
 import { useCoverVersions } from '@/features/book/composables/useCoverVersions'
-import { getBreakdownColor, getBreakdownSeries, type BreakdownDimension, type BreakdownSeries } from '../../lib/breakdown'
+import {
+  DEFAULT_BREAKDOWN_DIMENSION,
+  getBreakdownColor,
+  getBreakdownSeries,
+  type BreakdownDimension,
+  type BreakdownSeries,
+} from '../../lib/breakdown'
 import { fetchUserReadingSessionTimeline, updateUserReadingSessionTimelineSession } from '../../api/statistics.api'
 import { useStatisticsConfig } from '../../composables/useStatisticsConfig'
 import BreakdownSelect from '../BreakdownSelect.vue'
@@ -60,7 +66,7 @@ const { filters } = useStatisticsConfig()
 const { coverUrl } = useCoverVersions()
 const themeStore = useThemeStore()
 const themeKey = computed(() => `${themeStore.theme}:${themeStore.accent}`)
-const dimension = ref<BreakdownDimension>('source')
+const dimension = ref<BreakdownDimension>(DEFAULT_BREAKDOWN_DIMENSION)
 
 const now = new Date()
 const selectedYear = ref(getIsoWeekYear(now))
diff --git a/client/src/features/statistics/composables/useStatisticsConfig.test.ts b/client/src/features/statistics/composables/useStatisticsConfig.test.ts
index a787d4373..05d8ac0db 100644
--- a/client/src/features/statistics/composables/useStatisticsConfig.test.ts
+++ b/client/src/features/statistics/composables/useStatisticsConfig.test.ts
@@ -1,7 +1,7 @@
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
 import { ref } from 'vue'
 import { flushPromises } from '@vue/test-utils'
-import type { AuthUser } from '@bookorbit/types'
+import type { AuthUser, ChartConfigEntry, StatisticsChartId } from '@bookorbit/types'
 
 vi.mock('@/features/auth/composables/useAuth', () => ({
   useAuth: vi.fn<() => unknown>(),
@@ -45,6 +45,27 @@ function setupAuth(settings: Record<string, unknown> = {}) {
   return { userRef }
 }
 
+const LEGACY_USER_CHART_ORDER_WITH_SOURCE_SECOND: StatisticsChartId[] = [
+  'reading-heatmap',
+  'reading-source-distribution',
+  'peak-reading-hours',
+  'favorite-reading-days',
+  'completion-timeline',
+  'goal-trajectory',
+  'progress-funnel',
+  'completion-latency',
+  'genre-reading-time',
+  'reading-pace',
+  'books-completed',
+  'reading-clock',
+  'reading-session-timeline',
+  'session-archetypes',
+]
+
+function chartEntries(ids: StatisticsChartId[]): ChartConfigEntry[] {
+  return ids.map((id, order) => ({ id, order, visible: true }))
+}
+
 describe('useStatisticsConfig - persist', () => {
   beforeEach(() => {
     vi.resetAllMocks()
@@ -95,4 +116,20 @@ describe('useStatisticsConfig - persist', () => {
 
     expect(mockToast.error).toHaveBeenCalledWith('Failed to save chart configuration')
   })
+
+  it('migrates the old default user chart order to put Where You Read last', async () => {
+    setupAuth({
+      statisticsConfig: {
+        charts: chartEntries(LEGACY_USER_CHART_ORDER_WITH_SOURCE_SECOND),
+      },
+    })
+
+    const { useStatisticsConfig } = await import('./useStatisticsConfig')
+    const { init, orderedUserCharts } = useStatisticsConfig()
+    init()
+
+    const chartIds = orderedUserCharts.value.map((chart) => chart.id)
+    expect(chartIds[1]).toBe('peak-reading-hours')
+    expect(chartIds.at(-1)).toBe('reading-source-distribution')
+  })
 })
diff --git a/client/src/features/statistics/composables/useStatisticsConfig.ts b/client/src/features/statistics/composables/useStatisticsConfig.ts
index 3f3b8746e..a0b110f0b 100644
--- a/client/src/features/statistics/composables/useStatisticsConfig.ts
+++ b/client/src/features/statistics/composables/useStatisticsConfig.ts
@@ -25,6 +25,51 @@ const DEFAULT_FILTERS: StatisticsFilterConfig = {
 const config = ref<ChartConfigEntry[]>([])
 const filters = ref<StatisticsFilterConfig>({ ...DEFAULT_FILTERS })
 
+const libraryChartIdSet = new Set<StatisticsChartId>(LIBRARY_CHART_IDS)
+const userChartIdSet = new Set<StatisticsChartId>(USER_CHART_IDS)
+
+const LEGACY_USER_CHART_ORDER_WITH_SOURCE_SECOND: StatisticsChartId[] = [
+  'reading-heatmap',
+  'reading-source-distribution',
+  'peak-reading-hours',
+  'favorite-reading-days',
+  'completion-timeline',
+  'goal-trajectory',
+  'progress-funnel',
+  'completion-latency',
+  'genre-reading-time',
+  'reading-pace',
+  'books-completed',
+  'reading-clock',
+  'reading-session-timeline',
+  'session-archetypes',
+]
+
+function matchesOrder(actual: StatisticsChartId[], expected: StatisticsChartId[]): boolean {
+  return actual.length === expected.length && actual.every((id, index) => id === expected[index])
+}
+
+function chartIdsByOrder(entries: ChartConfigEntry[], ids: Set<StatisticsChartId>): StatisticsChartId[] {
+  return entries
+    .filter((entry) => ids.has(entry.id))
+    .sort((a, b) => a.order - b.order)
+    .map((entry) => entry.id)
+}
+
+function withUserChartOrder(entries: ChartConfigEntry[], order: StatisticsChartId[]): ChartConfigEntry[] {
+  const orderById = new Map(order.map((id, index) => [id, index]))
+  return entries.map((entry) => {
+    const order = orderById.get(entry.id)
+    return order === undefined ? entry : { ...entry, order }
+  })
+}
+
+function migrateLegacyUserChartOrder(entries: ChartConfigEntry[]): ChartConfigEntry[] {
+  const userOrder = chartIdsByOrder(entries, userChartIdSet)
+  if (!matchesOrder(userOrder, LEGACY_USER_CHART_ORDER_WITH_SOURCE_SECOND)) return entries
+  return withUserChartOrder(entries, USER_CHART_IDS)
+}
+
 function normalizeCharts(saved: ChartConfigEntry[] | undefined): ChartConfigEntry[] {
   const knownSet = new Set<StatisticsChartId>(KNOWN_CHART_IDS)
   const filtered = (saved ?? []).filter((e) => knownSet.has(e.id))
@@ -34,12 +79,9 @@ function normalizeCharts(saved: ChartConfigEntry[] | undefined): ChartConfigEntr
     visible: true,
     order: filtered.length + i,
   }))
-  return [...filtered, ...newEntries]
+  return migrateLegacyUserChartOrder([...filtered, ...newEntries])
 }
 
-const libraryChartIdSet = new Set<StatisticsChartId>(LIBRARY_CHART_IDS)
-const userChartIdSet = new Set<StatisticsChartId>(USER_CHART_IDS)
-
 function normalizeFilters(saved: StatisticsFilterConfig | undefined): StatisticsFilterConfig {
   return {
     libraryIds: saved?.libraryIds ?? DEFAULT_FILTERS.libraryIds,
diff --git a/client/src/features/statistics/lib/breakdown.test.ts b/client/src/features/statistics/lib/breakdown.test.ts
index 92e1c5fde..3d40854a9 100644
--- a/client/src/features/statistics/lib/breakdown.test.ts
+++ b/client/src/features/statistics/lib/breakdown.test.ts
@@ -5,9 +5,14 @@ vi.mock('@/lib/echarts', () => ({
   oklchToHex: () => '#000000',
 }))
 
-import { getBreakdownColor, getBreakdownSeries } from './breakdown'
+import { BREAKDOWN_OPTIONS, DEFAULT_BREAKDOWN_DIMENSION, getBreakdownColor, getBreakdownSeries } from './breakdown'
 
 describe('breakdown', () => {
+  it('defaults source-or-format charts to format', () => {
+    expect(DEFAULT_BREAKDOWN_DIMENSION).toBe('format')
+    expect(BREAKDOWN_OPTIONS[0]).toEqual({ value: 'format', label: 'Format' })
+  })
+
   it('returns the three source buckets for the source dimension', () => {
     const series = getBreakdownSeries('source', 'theme:violet', [])
     expect(series.map((s) => s.key)).toEqual(['bookorbit', 'koreader', 'kobo'])
diff --git a/client/src/features/statistics/lib/breakdown.ts b/client/src/features/statistics/lib/breakdown.ts
index 7fc8ca3c9..38bea5f9b 100644
--- a/client/src/features/statistics/lib/breakdown.ts
+++ b/client/src/features/statistics/lib/breakdown.ts
@@ -5,9 +5,11 @@ import { resolveSourceBucketColors } from './source-bucket-colors'
 
 export type BreakdownDimension = 'source' | 'format'
 
+export const DEFAULT_BREAKDOWN_DIMENSION: BreakdownDimension = 'format'
+
 export const BREAKDOWN_OPTIONS: { value: BreakdownDimension; label: string }[] = [
-  { value: 'source', label: 'Source' },
   { value: 'format', label: 'Format' },
+  { value: 'source', label: 'Source' },
 ]
 
 export interface BreakdownSeries {
diff --git a/client/src/features/statistics/statistics-chart-meta.test.ts b/client/src/features/statistics/statistics-chart-meta.test.ts
new file mode 100644
index 000000000..5ac9193f6
--- /dev/null
+++ b/client/src/features/statistics/statistics-chart-meta.test.ts
@@ -0,0 +1,9 @@
+import { describe, expect, it } from 'vitest'
+
+import { USER_CHART_IDS } from './statistics-chart-meta'
+
+describe('statistics chart meta', () => {
+  it('places the Where You Read chart at the end of the user tab defaults', () => {
+    expect(USER_CHART_IDS.at(-1)).toBe('reading-source-distribution')
+  })
+})
diff --git a/packages/types/src/statistics.ts b/packages/types/src/statistics.ts
index be3a91665..8c10511d0 100644
--- a/packages/types/src/statistics.ts
+++ b/packages/types/src/statistics.ts
@@ -79,7 +79,6 @@ export const DEFAULT_LIBRARY_CHART_ORDER: StatisticsChartId[] = [
 
 export const DEFAULT_USER_CHART_ORDER: StatisticsChartId[] = [
   "reading-heatmap",
-  "reading-source-distribution",
   "peak-reading-hours",
   "favorite-reading-days",
   "completion-timeline",
@@ -92,6 +91,7 @@ export const DEFAULT_USER_CHART_ORDER: StatisticsChartId[] = [
   "reading-clock",
   "reading-session-timeline",
   "session-archetypes",
+  "reading-source-distribution",
 ];
 
 export const DEFAULT_STATISTICS_CHART_ORDER: StatisticsChartId[] = [...DEFAULT_LIBRARY_CHART_ORDER, ...DEFAULT_USER_CHART_ORDER];