David, this happens when a user has a single image directory with multiple project files, like ab_Minimal.jap, ab_Neptune.jap, and ab_Tiger.jap. The core gets confused because the upload path is stored in .info, not in the project file. So, even though there are three different project files, there's only one .info file sitting in the image directory. The core has no way to account for the fact that the project has been uploaded to three different places.

Given that there may be only one user in the world who is doing this, it's probably not worth fixing.

ETA: This situation also produces some real disasters if you tell jAlbum to delete the entire project. Since the project may have been uploaded to three or more different places, jAlbum has no idea what it should be deleting. It can't know.