diff --git a/libs/@guardian/react-crossword/src/utils/getCells.ts b/libs/@guardian/react-crossword/src/utils/getCells.ts
index fae096ed9..9035acf84 100644
--- a/libs/@guardian/react-crossword/src/utils/getCells.ts
+++ b/libs/@guardian/react-crossword/src/utils/getCells.ts
@@ -20,8 +20,8 @@ const fillSeparatorCells = ({
 	rows: number;
 	cols: number;
 }): Cells => {
-	for (let i = 0; i < rows; i++) {
-		for (let j = 0; j < cols; j++) {
+	for (let i = 0; i < cols; i++) {
+		for (let j = 0; j < rows; j++) {
 			const currentCell = cells.get(`x${i}y${j}`);
 			if (currentCell === undefined) {
 				const newCell: Cell = {
diff --git a/libs/@guardian/react-crossword/stories/Formats.stories.tsx b/libs/@guardian/react-crossword/stories/Formats.stories.tsx
index 59a0c903e..1d415c6a6 100644
--- a/libs/@guardian/react-crossword/stories/Formats.stories.tsx
+++ b/libs/@guardian/react-crossword/stories/Formats.stories.tsx
@@ -1,5 +1,5 @@
 import type { Meta, StoryObj } from '@storybook/react';
-import { Crossword } from '../src/index';
+import { Crossword } from '../src';
 import { defaultTheme } from '../src/theme';
 import { cryptic } from './formats/cryptic';
 import { everyman } from './formats/everyman';
@@ -9,6 +9,7 @@ import { quickCryptic } from './formats/quick-cryptic';
 import { quiptic } from './formats/quiptic';
 import { special } from './formats/special';
 import { speedy } from './formats/speedy';
+import { uneven } from './formats/uneven';
 import { weekend } from './formats/weekend';
 
 const meta: Meta<typeof Crossword> = {
@@ -57,3 +58,7 @@ export const Speedy: Story = {
 export const Weekend: Story = {
 	args: { data: weekend },
 };
+
+export const Uneven: Story = {
+	args: { data: uneven },
+};
diff --git a/libs/@guardian/react-crossword/stories/formats/uneven.ts b/libs/@guardian/react-crossword/stories/formats/uneven.ts
new file mode 100644
index 000000000..f5b1f5d7e
--- /dev/null
+++ b/libs/@guardian/react-crossword/stories/formats/uneven.ts
@@ -0,0 +1,175 @@
+import type { CAPICrossword } from '../../src/@types/CAPI';
+
+export const uneven: CAPICrossword = {
+	id: 'crosswords/uneven/1',
+	number: 1,
+	name: 'Uneven crossword No 1',
+	creator: {
+		name: 'Oliver',
+		webUrl: 'https://www.theguardian.com/profile/maskarade',
+	},
+	date: 1729900800000,
+	webPublicationDate: 1729897217000,
+	entries: [
+		{
+			id: '7-across',
+			number: 7,
+			humanNumber: '7',
+			clue: 'Yields to Wimbledon favourites, we’re told (5)',
+			direction: 'across',
+			length: 5,
+			group: ['7-across'],
+			position: {
+				x: 0,
+				y: 2,
+			},
+			separatorLocations: {},
+			solution: 'CEDES',
+		},
+		{
+			id: '9-across',
+			number: 9,
+			humanNumber: '9',
+			clue: 'Deafening noise of item of sports equipment heard (6)',
+			direction: 'across',
+			length: 6,
+			group: ['9-across'],
+			position: {
+				x: 0,
+				y: 4,
+			},
+			separatorLocations: {},
+			solution: 'RACKET',
+		},
+		{
+			id: '13-across',
+			number: 13,
+			humanNumber: '13',
+			clue: 'Whitish bucket is suggested (4)',
+			direction: 'across',
+			length: 4,
+			group: ['13-across'],
+			position: {
+				x: 0,
+				y: 6,
+			},
+			separatorLocations: {},
+			solution: 'PALE',
+		},
+		{
+			id: '17-across',
+			number: 17,
+			humanNumber: '17',
+			clue: 'Bird with the French name (5)',
+			direction: 'across',
+			length: 5,
+			group: ['17-across'],
+			position: {
+				x: 0,
+				y: 8,
+			},
+			separatorLocations: {},
+			solution: 'TITLE',
+		},
+		{
+			id: '1-down',
+			number: 1,
+			humanNumber: '1',
+			clue: 'Parish priest and little girl by vehicle (5)',
+			direction: 'down',
+			length: 5,
+			group: ['1-down'],
+			position: {
+				x: 0,
+				y: 0,
+			},
+			separatorLocations: {},
+			solution: 'VICAR',
+		},
+		{
+			id: '2-down',
+			number: 2,
+			humanNumber: '2',
+			clue: 'Extremist’s excellent in slang (7)',
+			direction: 'down',
+			length: 7,
+			group: ['2-down'],
+			position: {
+				x: 2,
+				y: 0,
+			},
+			separatorLocations: {},
+			solution: 'RADICAL',
+		},
+		{
+			id: '3-down',
+			number: 3,
+			humanNumber: '3',
+			clue: 'The reply is “Warne’s out!” (6)',
+			direction: 'down',
+			length: 6,
+			group: ['3-down'],
+			position: {
+				x: 4,
+				y: 0,
+			},
+			separatorLocations: {},
+			solution: 'ANSWER',
+		},
+		{
+			id: '13-down',
+			number: 13,
+			humanNumber: '13',
+			clue: 'Darlings step out (4)',
+			direction: 'down',
+			length: 4,
+			group: ['13-down'],
+			position: {
+				x: 0,
+				y: 6,
+			},
+			separatorLocations: {},
+			solution: 'PETS',
+		},
+		{
+			id: '16-down',
+			number: 16,
+			humanNumber: '16',
+			clue: 'Squint at member of the House of Lords (4)',
+			direction: 'down',
+			length: 4,
+			group: ['16-down'],
+			position: {
+				x: 4,
+				y: 7,
+			},
+			separatorLocations: {},
+			solution: 'PEER',
+		},
+		{
+			id: '18-down',
+			number: 18,
+			humanNumber: '18',
+			clue: 'Rubbish work on a shuttle (3)',
+			direction: 'down',
+			length: 3,
+			group: ['18-down'],
+			position: {
+				x: 2,
+				y: 8,
+			},
+			separatorLocations: {},
+			solution: 'TAT',
+		},
+	],
+	solutionAvailable: true,
+	dateSolutionAvailable: 1729897200000,
+	dimensions: {
+		cols: 7,
+		rows: 11,
+	},
+	crosswordType: 'quick-cryptic',
+	pdf: 'https://crosswords-static.guim.co.uk/gdn.quick-cryptic.20241026.pdf',
+	instructions:
+		'<b>TODAY’S TRICKS</b> Clues begin or end with a definition of the answer. The rest is one of these:\n<b>Anagram</b>\nAn anagram of the answer and a hint that there’s an anagram\n‘Senator arranged crime (7)’ gives TREASON\n<b>Charade</b>\nA combination of synonyms\n‘Qualify to get drink for ID (8)’ gives PASSPORT (pass + port)\n<b>Double definition</b>\nBoth halves are definitions!\n‘Search scrub (5)’ gives SCOUR\n<b>Soundalike</b>\nSomething that sounds like the answer\n‘Excited as Oscar’s announced (4)’ gives WILD',
+};