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.