Thanks for your suggestion!
Yes, I did re-create the thumbnails. That's actually how they got messed up.
I had added a couple of new images and the grid "broke" on the front end. This has happened before and re-creating the thumbnails fixes it. Then I go in and crop them again to where I want them using EDIT THUMB. But the EDIT THUMB option isn't working now.
Like in the second row I have 2 tables and the thumbs are showing the legs. I want to crop it so the top of the tables are visible:
And I have re-created the thumbs again but nothing has changed.
Does NextCellent support show up in this forum? Besides this problem there is the issue of the grid breaking on the front end when a new image is added. It would be nice to get some help from them.