Welcome to the forum, I see what appears to be clashes behind Anna's neck, you have expressed some clashed sounding marks, behind her neck, out of her neck, etc, if someone could post a Morgan dollar
overlay I am sure things would be clearer to understand.
I also see the ( as mentioned above ) sunken perimeter of the coin, the stars and date seem sunken, very nice looking feature, not common, yet not uncommon. I would ask is there an apparent clash mark in the form of a line on the reverse from the eagle's right wing going up to the letters "IN" I would venture there would be one as you have explained the clash from her neck, which this directly explains that clash.
I hope you see a overlay and it explains some of the "marks" you spoke of, good luck, Mike. PS, I see in the Morgan/Peace forum here where you posted this topic there is another topic about Morgan dollar
overlays, there is aa picture in that topic that is an overlay, check it out!