I am having the same problem. It makes it VERY difficult to organize and keep track if a user cannot permanently delete a file. I uploaded a series of files that duplicatd prior low-res images and then attempted to remove the older files. No luck! On my portfolio page they re-appear within a matter f hours. This is a major PIA that has persisted for quite some time according to the posts complaining about it. I would prefer that bugs in basic operations were fixed prior to new layouts and appearance.