Don't worry about that, insignificant. What your seeing currently, a MM that was sitting at the bottom or near bottom on Level 2 at the close yesterday. This is normal, happens every day.
As soon as the market closes today, watch your Level 2 closely. MMs will start dropping off except one, and that MM will be the one you'll see until the next trading day opens.
They all start coming back on L2 at the bell.