yes, with torrents you are expected to give back. Unlike most torrent programs, LW does not keep track of your share ratio. However in settings it auto-shares at a particular rate or attempts to. You can potentially change this but not sure what effect it will have with your downloading as well. Normally with torrents, the more you share back, the better the downloads are.

If a torrent has problems with %'s etc. then perhaps re-open the torrent file you downloaded from the site.

Well, I'm across the tasman and my isp does not include uploads on my monthly quota at all. It only counts download bandwidth used. So even if I get shaped for going over my quota, my uploads will be non-capped.