I think with us skinny guys,it looks worse than it is.
Just draw the bow back,take a deep breathe and relax.Don't tense.I can tell your tense just by your fingertips.You are holding your figers up and away from the riser instead of just letting them lay there in a relaxed state.The problem with the shoulder is when you start pulling it back toward your ear and it doesn't appear you are doing that.
You really need to try and get the string back on your nose if possble.It might take more draw length.Maybe a little higher anchor,or both.One of the downfalls of the short a-a bows.
My front shoulder has a slight hump with or without a bow when my arm is extended.Some things just can't be changed with your body.
Washington,I believe your arm was raised more than Mo's if I remember correctly.