[U2Lynne]

I can't speak for PCs, but I know on my Mac if I switch users, I can leave applications running, like Azureus/Vuze, and it will continue running just fine. You can always check your profile tab > Torrent Stats and see your Current Activity on the tracker. You are currently listed to be in seed mode for two shows, however, neither of them have leechers, so you won't be actually seeding at all.

If you have an incomplete torrent (like missing the text file), if you point your .torrent file to the show, it will 'check' it and see you are missing the text file and download just that and then should go into seed mode.