I recently got a Halon 6, which is a little heavier than my last bow. Been shooting for 6 years, never had a consistent problem shooting low before...I'm 2-3 inches low on at least half of my shots from 20 yards. My left/right is good. I've moved my sight up and still no change...any ideas on how to remedy? Are there any common problems attributed to shooting low? Thanks in advance.