This has happened, but I am sure it is a mistake caused by a bug
http://www.ncwoodworker.net/forums/s...d=977#poststop in the display of sub categories in some situations and the fact that member created subcategories have a default permission that allows other member's to upload to the subcategory.
So if you have created subcategories, run, not walk to the Gallery Page that shows just your sub categories, Click on the "My Stuff" menu and select "Category Admin". Then edit each sub category and turn off the permission that allows other members to upload.
Please remember that there are only 2 places for you to upload pictures. YOUR member Album or one of the Public Albums.
Sorry for the confusion