Your elbow on your bow arm should be slightly bent. At full draw, your release arm should be a straight line from your elbow through your hand and your release. If your draw length is too long, you'll have to angle your wrist in order to hit full draw. Or, you'll have to lock out your bow arm elbow. You'll get string slap doing this and it is a self correcting problem.
I don't use a kisser button, but you can. I hit my anchor point and touch the tip of my nose to the string. Note I didn't say press my nose to it, just touch.
Take your bow down to High Mountain and shoot it while one of the guys is watching you. Then, you can have them help you tune it and make sure your form is correct.