i dont use bittornado i cant say for sure whats ur solve.
everything is set fine,but,u said somewhere sth about 11kb/s.
this is ur max speed??,cuz bitcomet say clearly
for dsl users limit u r uploads.
I think 26 peers is to much for ur linespeed,router etc has too much incoming connection so it is overloaded,limiting and even full stoping u froom connecting to other peers.i have 4mbit connection and i limit to 25-35peers.
maybe thats ur problems.Too many peers for u.Try to limit to 10-15.U may have less speed but may no loose connection due to heavy job of router..
and for the end//change ur client... mmmmmm