LT Seeds waste too much data

I am facing this issue that whenever I try to download from bitcomet I can easily connect to LT seeds but they start to lose too much data. If I disable the LT seeds option I get slow speeds but there is no wasted data. The data is only wasted when I turn on the LT seeds option. Please help me...
I am using BitComet 1.37 32bit (the latest release) and I have a 3g connection which is fast enough for me. I use a TP-Link 3g Router TL-MR3420 and I have a successfully forwarded port (green light). I am using windows 8.1 64bit. The issue is just with LT seeds wasting so much data. Every thing else is just fine.
Thanks,