Are you still shooting the stock PSE strings? I like PSE and all but their stock strings leave a lot to be desired. I'd buy a good set for them regardless.

I think your inconsistancies, might be a little target panic. Assuming the shot you're throwing out isn't the same arrow everytime.

For me, when a shot breaks and after my follow through, I can tell you whether it was a good shot or not. Without looking at the target.