@stumper I was having the same issue, but after I waited about 30 minutes and than it showed that I was seeding.

Do you by any chance have other torrents seeding? If so, you may have torrent queuing enabled. Go to your settings, then go to Queuing and either uncheck the box to disable it, or change the maximum number of active torrents and the maximum number of active uploads to 999. This should resolve your issue.