Hello,

First of all a seedbox does not guarantee any kind of seeding. Your upload speed is depending on many factors including the leechers of the torrent (their count, their download speed, their torrent client), other seeders (their count, their upload speed and their torrent client), on your HDD / SSD load (for better performance you should use SSD, since it has way faster diskio), your upload speed (which you mentioned that is fine) and lastly your torrent client configuration.