Quote from Trader.NET:
One,
As I indicated in my later post that my order disappeared from TWS and IB system (quote "dropped off the screen") after the last change I made at 10045. TWS showed me I was short and no standing open order so I entered a new order to cover at 10049. After the market close, IB found the missing order that was executed at 10045 after the market close.
I gotta tell you, this has been one confusing story. I think I got it now. You entered an order which evidently was executed but did not show in your system. So you entered a second order. Is that about it?
Frankly, had I been in your position I would have called them to verify the fill before I entered anything else. Then they would have had an opportunity to tell you that you had no position.
I had a situation where I entered a limit order, but near the price the market was trading at in the ES. About that time I was dropped from TWS (my own fault, not IB's). During that brief period where I was off the system, I was filled. When I signed back on, it appeared I should have a fill, but it did not show as an execution. So I called IB. They told me I had a position.
Later, when I closed the position, I was kind of nervous about it, so I called back and verified that I was flat at that time. I was.
Had they THEN come back to me and claimed I had a position I might have had a arguable point since I had done everything within my power to take responsibility for knowing my position.
In this case I think you're sunk. You didn't check. You assumed.
IndexTrader