I just bought a Mathews Extreme Z7 bow and my deer target just came in. So, I decided that I was going to shoot the bow this weekend but I was very inconsistant and I broke 1-arrow and lost the other. Well, at least I didn't break or lose my new Carbon Express arrows. Some time when I shoot, I'm dead on center and other times the arrow sails over the deers back. What am I doing wrong? Not sure if my grip is too tight, not have my anchor point set correctly, back isn't straight or if I'm jerking when I pull the trigger on my release.