The bow should follow your "lifeline" on your hand.

Notice how the pic of the pro has his hand turned outward.

Here is what my hand looks like,I don't go quite 45 but you can see there is considerably less palm on the grip than what you exibit.This reduces torque.

like tfox said the back of the bow grip should cover your lifeline on your hand. your knuckles should be at a 45 degree angle to the bow.
when you pull back your bow try and pretend there is a ball between your shoulder blades and your squeezing it with your shoulder blades.

also make sure your not trying to pull to much weight. you should be able to set on a stool and pull your bow back comfortably.

I can easily sit cross legged on the floor and pull my bow back that's not the issue. Maybe it's getting my muscles more used to it but I shoot fairly often. Before I feel tired I notice my patterns spreading out and that's when I know it's time to call it quits. I just pulled my bow back and made my hand stay at a 45, that felt so awkward and seemed way more strenuous on my bow arm.

Just sitting here I may have figured out what you guys mean, I'll go try what I just thought of and see if it still feels as awkward.

I just did it and I'm pretty sure when I shoot I do that naturally, it's just in my pictures I was trying to beat a self timed camera so now I realize my pictures may not be exactly how I shoot. I'll have my girlfriend take pictures of my when I actually shoot sometime. Even when I make sure my knuckles have a 45 it doesn't cure my deltoid soreness.

I don't think the bow hand is what will take care of the soreness,that was just something I noticed and threw it in there.

Your bow arm locked out and seemingly pushing forward instead of letting bone to bone contact take place is what I "think" is causing the soreness.

my .02 worth....try to learn to shoot with both eyes open. It takes a lot of practice, but you will see the target and arrow much clearer than trying to shoot with 1 eye. I had a bad habit of moving my head to try to see the arrow.

Shorten you DL and straighten your wrist a bit, your elbow should be slightly bent.

Unfortunately I can't shoot both eyes open because I'm actually left eye dominant. You may say I should shoot left handed but honestly, it's not going to happen. I typically leave both eyes open until right before I shoot to make sure my pin is right where I want it.

Why won't it happen? Many have made the switch and it really doesn't take as long as you might think to get comfortable(many think it is more comfortable in a short time)

My daughter shoots left handed because of her dominant eye.