That is strange. When I first installed the software a couple of years ago, an album created by a user would update to the latest image that was uploaded in that album every time a new image was uploaded. That is how I knew which album to look at for a user's latest submission.
I have always had category thumbnails set, but albums would update with each upload. Perhaps in my lame attempt to customize my site in the beginning, I screwed something up to where it would update. Now that I finally updated the software it is the way it should be.
No worries, I appreciate the reply.