I'm running the current stable version of 1.6.23 and the gallery is https://bellaramsey.org
The problem I'm having is that I can't get the Show first level album thumbnails in categories to nest the categories inside the main category. It's a new install and upgrade to the latest verison, and I'm a bit perplexed cause when I've unticked this in the other installations it's nested properly as it does in this gallery https://temueramorrison.org/gallery that has been updated to the latest version of 1.6.23. The Show first level album thumbnails in categories has been unticked in this gallery.
NWN
Gallery for the Bella Ramsey site is https://bellaramsey.org/gallery. Would have edited the original post, but there's now edit option.
Found the issue. I forgot to set Number of levels of categories to display to 1. Don't know why I missed that.
Closing topic now.