Okay, did that but it didn't change the problem.
I couldn't figure out how to select an earlier backup. I could try that if you can tell me how.
No, it lists only the latest.
Yay! And now I know how to use Image Capture. I deleted just the images I had imported from the cell phone (which I will NOT use for photos again), trashed them, and the photo app on the iPad is now functioning normally. I am now doing a manual backup of the iPad, just to be on the safe side.
Thanks for sticking with me on this one. I learned 1) don't mix very old software (cell phone) with very new (iPad), 2) Image Capture is handy, 3) if I get an odd indication when doing a transfer (6 images when there was only one), stop right there and don't proceed.