something very strange happened today on my tdamer

something very strange happened today on my tdameritrade account and a buy order that I had in for EGOC.. I got up early this morning and posted a 500,000 share buy order at .0051. I double checked to see that it was open and active and it was. I went back to sleep. I woke up later and checked on my running open bid of 500,000 at .0051 and there was nothing there. Not trace of any order what soever it just vanished as if it was never placed. I checked the time and sales and my order should have been partially filled with about 250,000 shares as some sold down there around noon. Nothing for me though and no sign or trace that I even had an order in to buy 500,000 at that price.. still scratching my head over that one. That was the very first time I have ever seen that happen on my trading account with TDameritrade. and before someone asks I did place the order during the normal open hours of the market I did place it during normal hours. No kidding this one really has me puzzled. I feel as though I got violated. lol

What I post is my opinions and thoughts based on my research. Please do your own DD before buying or selling any stock. I am just as capable as the next guy in making good or bad investment choices! We win a few, we lose a few. That is the nature of the game!