I have the darndest problem. Right now I'm about an 9 handicap(early in the season

) and was as low as a six at one point last year. My biggest weakness by far is my short game. I do not get up and down nearly enough. Putting is solid, chipping and pitching is absolutely horrid. I'd rather hit a full sand wedge than a ten yard chip.
I am naturally a hitter and working at the range, I've noticed I chip much better just right handed. I set my wedges and take a nice swing back and through and end up with a relatively accurate shot. For whatever reason when I place my left hand on the club the wheels come off. It's like the hands just can't work together. It feels like the left hand actually stops the right hands natural swing and then I break down at impact, or just quit.
Anybody else have a similar dilemma and what can I do to fix it. Thanks