I think it's different MMs having different prices. Most decent trading platforms will give the best price so you dont pay full ask. I think some 'free' ones charge full ask and keep the difference.
Some of the tiny trades at full ask (or bid) look like people trying to spoof the record too.
I daresay the irony that you, of all people, think all the shares can be purchased at today's share price is lost on you. But if you were so convinced it would be you that was long gone.