Story is suspicious on your end but if they filled you Friday they must let you know before the market opens on Monday. At least that was my impression of the rule. It maybe not even apply today but I would asked them about it unless they did let you know before the market opened today. Over a half a billion shares traded Friday.
placing an order at the very high of the day on a limit order, then canceling immediately. sure you didn't enter a market order? If not didn't you not see the notice about being orders delayed and running a fast market. even in the best of conditions trades like that are nearly impossible to cancel.
This trader's claim is not at all "supspicious". I have the same problem. Placed an order for $40.50, cancelled it at $41, thought everything was OK. Got notice today at 1:17 PM that my trade was executed "successfully". FIVE DAYS to confirm? Only 500 shares, thankfully, but I will still sue.
Don't you people ever learn? The small investor gets screwed every time, and especially on IPO'.s Although more people apparently got the message this time because the big boys couldn't run up the price to 3 or 4 times the opening amount like in the good old days. Score: wall street fat cats 1, small investor, 0. Sucks, but that is the way it is.