This morning at 10:01, I put in a limit order to short the EUR/USD @ 1.2474 on IdealPro. Then I decided that was a bad idea and I canceled the order. Everything showed that the order was canceled successfully an I did not get filled. By everything, I mean the order on the main window showed that it was canceled and then it went away, Book Trader showed that I had no position, and the account window showed that I had no position. Then at 10:38 I saw my account drop in value suddenly, with no corresponding price movement against the trade I had on at the time. I looked at my executions and it showed that I went short at 1.2474 at 10:38:23. The price during that minute was 1.2521 to 1.2525. I already had a short position on and didn't have any pending orders to add to it at 10:38:23. The second short position required too much margin, so IB closed it a minute later at 1.2517. So I called IB and they said that the order from 10:01 had been filled and the reason that it didn't show up anywhere in TWS until 10:38 was that Duetcha Bank was having "booking issues." He said that I was stuck with the 43 pip loss and there was nothing IB could do about it. WHAT ABSOLUTE B.S.!!! I will never trade on IdealPro again.