KansasDoe, I found this video to help me explain what I think is happening to you.
I think the Deer are jumping the string. A deer will drop it's entire body width as they begin to bound off.
My advice would be to increase the draw weight on your bow a little more or aim about 6 inches lower on the deers body.
Democracy is two wolves and a lamb voting on what to have for lunch.
Liberty is a well-armed lamb contesting the outcome of the vote.