I would agree with that if the problem was with all the thumbnails, but it's only with some of them. I went through the files, and the tnpg images are there. I have quite a lot of files, so I am not 100% certain they are ALL there.

Should I try to copy the plug_profilegallery folder from the current to the new site and see if that corrects the issue? I am just not sure how well it connects to the database when I perform those changes, so I wouldn't want to mess it up. I could update the database after copying too. Just want to make sure I don't make it worse

It was a database issue, probably a result of the migration. A couple of ids didn't transfer correctly. But it took quite a bit of digging to discover. I manually adjusted the ids and the issue is gone.

Thanks for your help!