OK, not so fast... I've found another oddity.
The following category only has 1 image in it, so it's a great test:
http://www.modelrailroadphotos.com/p...ry.php?cat=545
I have recent, most popular and random images enabled.
So, if you click on the image under the category heading, "more" only shows 1 image. (which is correct, as there is only one in the category)
If you click on the image in the random area, it only shows 1 image.
However, if you click on the same image under the "recent" or "most popular" then it shows a whole line of images, most from other categories.
Is that working as intended?