How badly are you raping your connection with bit torrent? Maybe QoS can only do so much...
Also, and I'd like some clarification from D-Link on this, but I don't think setting things to a priority of 1 or 2 is a good idea. I heard that 128 was kind of a baseline and that 100, 101, 102, etc would be best and that 1, 2, 3 etc could cause problems. Maybe I am wrong. Any guidance Lycan?