I was getting download speeds > 10MB/s when downloading back to me, but the download never finished (it was stopping at random points)
Great, the speed anyway. I only get 1MB/s if I'm lucky. As for the downloads stopping I have not had that issue myself, could you try again with some of the more recent changes to see if it still happens.
magnet urls seems to work in the way that the name gets displayed but they don't seem to download
None of my tests included magnets, however currently it seems to exhibit the behavior you mention but if you click the status link then you can see the progress. Something to work on...
when trying to add some other file after refresh I kept getting "failed to add torrent", maybe you were changing something
Hmm... have not experienced that yet either, does it still occur? If so is it reproducible by a specific torrent or procedure? I might have been making changes and you simply had bad luck