Man, I think you're seeing things that aren't there. Put it down for a couple days, then come back to it. I think you're just looking too hard. It happens. I've done it, probably most of us have.
You are probably right. I saw the raised thing on the top left and thought it may be it. I guess for it to be it I should see more than just that. Probably just a die crack then. I remember seeing a perfect O/CC in a junk silver bin, I ended up getting an 1878 Morgan though.
I can't tell you how many S mint marks I've seen on my 1909VDBs. The harder I look, the more I see them. Then the next morning they're not there!
I have noticed that if you want to see something you will, if you are neutral with no opinion or knowledge you probably won't notice anything.