Using a proper torrent program such as uTorrent or Vuse (Azureus) would help greatly.

Did you check how old the torrent link was before you chose it? Some older ones will not have so many people online/still sharing it. LW's share back for torrent uploads is preset. LW does not keep track of share ratio. And this in itself might be getting you excluded from some torrent peers.
At least with a proper torrent program you can control many factors, especially with the more advanced settings. With LW it's just hope for the best.