When the number of cards in a Hub Gallery is not divisible by 4, the remaining cards are stretched across the last row. There are multiple reasons to keep all cards the same size:
- Visually more orderly and appealing
- The last items are not more important. Larger size implies more importance.
- Keep the same aspect ratio for thumbnails.
Since I was already using the manual option for galleries, I find myself putting the last row in its own gallery and padding with empty text boxes to stop the stretching. This workaround is messy and I hope the hub will be changed to either default to standard card size or provide that option.