Lady Arwen!

If your comfortable shooting with a straight arm and shoot well this way, then I'd stick to it .I also reccommend a shorter release without the loop on your string.maybe this would help.But as for the behind the ear ,I would think that this would cause all kind's of control problem's .
You can keep trying his method and try to make it work, or try the above and see if this make's a difference. I'd hate to see you have to get rid of your Justice because they're a great bow and I'm sure your really gonna love it .
Congrat's to you on your new Justice and let us know what work's for you.

nubo