Log says files have been moved, but still in source?

I have some very simple rules that find files based on the name and move them. The log shows that the files are being moved, and they are. The problem is that the originals are not being removed.
If it matters, the source and destination are both dropbox folders.
Screenshot showing supposedly successful move and that file is still in the original folder: https://db.tt/Vxin3r5A
If it matters, the source and destination are both dropbox folders.
Screenshot showing supposedly successful move and that file is still in the original folder: https://db.tt/Vxin3r5A