"Ok, so you understand orders can be cancelled after all other orders ahead of it are complete. What would removing the wall after every nibble do, and then replacing it? Nothing. "
Wrong, it scares people exactly as it did here, or excites them, into action. Evidence is already at your feet.
The people on the market think, "I have to do something. This person obviously knows something that I don't. I better sell just in case."
And with a history of insider trading, who could blame them?