Thumbnail problems

I am using the newest plugin update. I am trying to add a new gallery. I added a new gallery a month ago had the same problems but finally got it to appear right. I got the page and the gallery but when you go the the gallery the thumbnails do not across the entire page. I had my settings set for 3 columns.

https://tomsfoolerychainmailejewelry.com/gallery/aluminum-chainmaille-jewelry/

This is a link to a gallery that worked right.
I am just at a lost on what to do.

https://tomsfoolerychainmailejewelry.com/gallery/sterling-silver-jewelry-2/
Thanks for any help
Tom