hi robert
where does your swing finnish???? , i find i use to do the same as you till i started swinging right through on a short 15 yard chip. i now always swing through to a high finish on all chip and pitch shots, it maybe a lot slower finnish to that of a full shot but i always finnish with my hands up at my shoulders at least, i feel i hit the ball crisper doing this and i dont shank or hit it fat now.
hope this helps
bill