With the armslap,make sure you rotate your hand over so your hand is basically perpendicular to the grip.This will create much more space for the string to clear.It will also reduce the torque.If you are having trouble with arm slap then I would also assume that there is induced torque going on.Reducing draw length can help but it is a bandaid cure and not fixing the real problem.
You can also cause torque with your face.Your anchor may be the problem but that is real easy to check.Just hold the string away from your face when you shoot it through paper to see what the tear looks like.With certain releases,I have a big problem with this.
My 9 year old daughter is doing the same thing with her grip and she is starting to get the message that if she doesn't get the grip right, then shooting a bow is more painfull than fun.