In my experience, drawing the string too far is typically what causes the nose damage. Your head should stay perfectly still/static during all phases of the shot....the string, hand, arrow should come to your face, not vice versa. The problem comes when you anchor on a spot, draw past alignment, you will actually turn your head into the draw...and subsequently right into the string.
Some guys with cross dominance experience additional problems with this same thing...maybe they are subconciously trying to get "the real" eye into alignment with the shaft at the peril of turning more of their face into the string.
Now, your head looks pretty still from the rear angle (though the link took me to the front angle, I found it next to it). It could be, you are just simply "over drawing". I know it sounds impossible since many preach "drawing as far as you can is a good thing" but if it gets form out of alignment, it certainly can be counter productive. Maybe a video from overhead would confirm your elbow is coming back past alignment with the arrow, especially when combined with your anchor further past the mouth corner?I've also seen this with guys anchoring further back on their face. Just because you can anchor at your ear doesn't mean that's the best place.
Just give it a try drawing "not quite so far" and see if it solves the string hitting problem. Then, if it does, work on a more solid lockup for anchor...a very definate, very repeatable spot. Remember, the anchor is the "rear sight" of your targeting system...if it doesn't repeat exactly the same each time, your accuracy will suffer just as much as with a waivering bow arm.
Then, lower the elbow down just a bit, slow down your shot process a little until you are hitting the way you want. It may naturally speed up after that...but if things go awry again, slow it down again.
Take your time and don't expect it to change overnight, it may take some time to get over the fear of nose scars.
We all still have fliers: concentration wanes, fatigue sets in etc. But you are more than capable of dwindling those down to 1 out of 10 or 1 out of 20 instead of 1-2 out of 5. You CAN improve your consistency...just get that rear sight aligned and in the same spot every time. Your front sight looks great so you have part of the battle already licked
Again, give it a try. What I'm saying may not be right for you and your body structure, but I think you'll see some positive improvements with a few minor changes.