All this arguing about market orders isn't relevant to after-hours trading. Market orders and stop orders aren't active in the AH sessions; only limit orders are.
So the OP did in fact place a limit order to buy, not a stop or market order.
Although anything is possible, it seems odd that if IB was corrupt, they would target just the OP on this one little trade instead of doing this sort of thing more frequently. I've never seen a complaint like this before in my 3+ years of surfing ET.
My guess is that the OP typed 86 instead of 76 and of course someone's limit orders to sell at those higher prices got filled and they were probably quite happy about it (just as the OP would've been quite happy had s/he gotten a favorable fill in the 76's because of another trader's order entry error).
As perfect as I am (
), I've been 100% certain of seeing something that was later proven wrong and I simply couldn't believe I could've seen it differently. It happens no matter how precise you are in every aspect of your life. Our brains can deceive us.
BTW, if you're short and you place a limit order to buy (cover) $10 below the closing price, that isn't evil. Companies often save their bad news for Fridays after the close or perhaps Monday morning price would gap down in pre-market, all legitimate situations in which the risk-taking short-sellers benefit at the expense of the risk-taking buyers. Trading and investing is risky.
It is a bit ironic though that the OP opens with this:
Quote from gster210:
just to see if it would get hit...if someone really wanted it or mistyped.
...and is pissed because s/he mistyped.