Somehow I'm having trouble changing the number of images/albums on a page. When I change them from 16 to 12, after hitting the save button they jump back to 16.

You have not mentioned the theme, so this is only a guess.

Quote:Note: If thumbnails per row is greater than 1, The actual number of thumbnails that are displayed on a page will be rounded up to the next multiple of it.

I'm not using the row/column feature and my own theme. Changing the values in themeoptions.php doesn't work and even if I delete that file from my theme nothing changes.

Zenphoto uses this calculating internally to generate the combined album and images pages.

Look at the database and maybe clear the value or delete the row with this setting. I could be a database issue.

Thanks. That looks like the solution. As you can see I have three rows that look alike. Can I delete two of them?

http://ompldr.org/vaGJrcw

No! Of course they are for the different collections

You can delete those rows. They will be re-created if needed (you can disable and enable the theme to set the defaults).