I've tried to explain already in some other forum replies, that as long as your torrent client can connect to the tracker and get the peer IPs, it is not a technical issue of our tracker. I am sure that any correct torrent client programme can connect to our tracker and get the IPs. I've used myself multiple: µTorrent/BitTorrent, Vuze/Azureus, BitComet, Transmission, qBittorrent, FreeDownloadManager …
That is because the upload/download (aka seeding/leeching) is negotiated directly between the torrent clients. It isn't go over the tracker or is controlled by the tracker.
Looking to your Profile, you seed two torrents right now:
The first got 453 seeds and 70 peers (leecher). Out of the 70, 69 got 98.53%. that means they have chosen not to download the 9 screen captions files, but only the movie. That makes 522 seeds for one real leecher, so it is absolutely "normal" that you won't upload to this single peer, you are in competition with more than 500 others.
The second got right now 53 seeds, no peers (leecher) no upload possible.
So that you don't upload has nothing to do with a technical issue of the tracker, but the dynamics of a torrent and torrent swarm.
If you join in very early, it is likely that you can upload something back. If you join late, many will complete before you and will become seeds before you and few members will join after you and those who do get feed from the many seeds. This leaves only low upload to each of them.
This particular case aside, we currently have a close eye on the "low" number of downloads per torrent, though the total numbers are about 20% higher than 3 months ago.
Please keep in mind that this year has seen two major changes targeting to generate an up-spin dynamic:
Introduction of the Freeleech feature
Automatic recycling of old torrents (rewarding those members who kezpt them alive over months)
assorted with once a 24 hours Freeleech Marathon and a few weeks of Freeleech Fest.