General Support: Gallery not displaying correctly

Hello,

I've used Plogger in the past for another client but it's been a few years. I just installed it for my current client and have run into issues. I had it fixed at one point but it broke without anything changing. Pretty much the problem is that the thumbnails should be displayed as 6 images per row (12 per page) but only the first row displays correctly and the rest just display however they like to. An image is attached. Any idea how to correct this issue? I've gone through all the settings and don't see what may have changed. It was fixed at displaying 2 rows of 6 thumbnails but when I went back to it about 15 minutes later it was how it was in the image.

Thanks,
Brad