Knowing it's a possibility and believing it'll happen are two different things. Many here have, for example, convinced themselves that an SEC lawsuit probably won't happen, and if it does, it'll be like getting a parking ticket.
Not necessarily.
Then there was the other 8K about the increase in activity and the increase in stock price that came out late in April.
FINRA traces unusual activity. Often they call the company and ask about it. That may have happened here. They do it for many stocks, and the companies may put out PRs saying they don't know the reason.