Not at all. MM's can and do collect shares without printing the buys in order to keep the price stagnant. Then they print them all at once. It's a type of form-T trade.

To avoid creating “an unbalanced market”, market makers often do not report certain trades during the day to the public and then use a T Trade not to “scare” investors into thinking a market for that stock is going in one direction or the other at the spurring of one large investor.