Form related? That would be my guess also. And often times the right left stuff and inconsistent form is caused by the draw length being too long. It's been observed by those who KNOW that probably 80% of shooters have their bow set from one to three inches too long. A good way to catch this is that I ask where you anchor. Shooting fingers I would not anchor past the corner of the mouth with the index finger. If you have this OK then I would have to say you grip the bow too tightly. There's some real good tutorials on this at "bowsite.com/bowsite/features/practicalbowhunter" Check it out.