This happened to me today, too. I had entered a short and tried to cancel it but I couldn't. Then a few seconds later a message appeared that said Market XT was down, then later Smart Orders were down. Fortunately they answered the broker line on the first ring and they said that my order never went live and that they'll cancel it in a few minutes, which is exactly what happened. These things happen occasionally, but most of the time the connection is great.
