Syncing PC photos with iPad

When I sync my PC photos with my iPad Air the way they appear on my iPad is very different from when I sync photos to my iPhone. Photos on the iPhone are very neatly shown with a thumbnail for each album. The iPad only shows two or three albums, one of which is a thumbnail entitled Pictures, which shows a thumbnail for every single photo in my PC Pictures folder. Most of the other albums are missing. Does anybody know what's causing this?