Originally Posted by torfreak

You can also check on the tracker's website, if the uploaded GBs were credited to you or not. Almost all private trackers keep the info on every torrent you snatch including torrent-wise leech/seed amount etc.

Also make sure that you turn things like DHT, Peer Exchange, and LSD OFF if you're using private trackers. Otherwise you can connect to people outside of your private tracker and waste upload on them and not get credit for it.

Lastly, keep in mind that you're looking at the torrent stats at a point in time and observing the number of seeders and leechers. It's possible while you were away that a peer jumped in, downloaded the entire torrent, and then disconnected. So as @masonos and @torfreak have said, look at the amount of upload your torrent client is reporting as well as the amount of upload your tracker has credited you for.