Hah, solved! Turns out the tracker info and the content files were going to different places.

Yes, there are active seeds and peers. And the Deluge dashboard indicates that it is downloaded and seeding.

When I try to download an epub torrent, I seem to only get the deluge torrent information, i.e., a file with the little raindrop showing. I don't have the same problem with other file types. Any ideas?