Okay lets try this
You using upload to optional categories set to yes in Admin => Upload Options
http://www.scrappinggallery.com/showphoto.php?photo=81 http://www.scrappinggallery.com/showphoto.php?photo=82 http://www.scrappinggallery.com/showphoto.php?photo=83
This would explain why you see that. See how the same image exists in all 3 categories. If you do not want your users to upload the same image to multiple categories set this option to no in admin