I think ur stealing too much from the SB. Id be interested to see your Stole stat for SB. Typically Att. Steal BU>CO>SB. From the SB ur in bad shape when called.
44% W$SD is pretty low with a 21% WTSD. Like daven rightly said you are probably failing to put villain on a range. Reading your posts confirms this. Your generally on the right track but often fail to explain the ranges you give the villain and therefore what equity you approximately have in the hand.