I'm having problems making profit at $10nl and $25nl 6-max. I have spotted a problem which maybe that I'm not winning enough (sounds obvious I know).

The average no. of players at my table is 5.46 which means I 'should' have won 18.3%. However I have won only 10.44% of games. I play a 18/10 game so is this just a necessary product of playing TAGish?