It is not manipulation. It is someone who says I'm going to sell my shares "market on open" that is where a market maker wanted to buy them, or a buy limit order was. That same person could have put a limit sell order out there.

In the grand scheme of things who cares, when this stock is trading 300,000 - 800,000 shares a day, those problems go away. Probe has trading over a million shares a day before.