This tends to happen with me if I cut using my right hand more then my left. It is like shooting a handgun. If you pull with your other hand while pulling the trigger, your shots will be off target...When I use too much right hand or too much arm that is when my cut goes off in iaido.
i was about to say the same thing. my iai instructor was watching me and said to try cutting with the left hand and let the right hand just go for the ride. then slowly start to bring the right hand back into play
nice post ash