Wrong size reported when files are set to "Don't Download"

[hyperair@gmail.com]

When setting some files to "Don't Download" (~2270MiB not to download), the Size reported by Deluge increases instead of decreases. For example, in a 5.3GiB torrent, I selected 2270MiB worth of files and set them to "Don't Download". The size reported rose to 7.1GiB. In another torrent (3.7GiB), I set all the files to "Don't Download" and the size rose to 4.0GiB instead of 0. The torrents in question are these two, though I can reproduce this with any torrent that is big enough and has multiple files: ​http://isohunt.com/torrent_details/13189848/chobits?tab=summary ​http://isohunt.com/torrent_details/19898592/chobits?tab=summary

The distro is ArchLinux and the version is 0.5.9.1.