There is a post on here from Len in Maryland talking about being careful with string and harness twisting. Please read that and adhere to the owners manual specs for these bows. Twisting too much could cause a major malfunction and ultimately injuring you.

On the note of the bow, take it to the shop you bought it and have it checked out. If they don't see anything wrong, send a few through the chrono to see what its shooting. Not doubting your word, but the scale you're using could be off. My buddy and I just found out how much scales can differ from shop to shop.