Basically I got my after hour trading enabled on Fidelity. I made an order to sell my stock at 250(at the time, the stock price was 249.4). And then after-hour started at 4pm. I was basically on the "trade order tab" and refreshing the page repeatedly and at some point, the after-hour price went up to around 270 suddenly and it lasted for like 6 seconds and then it went down to the usual price which was 249.4 but the problem is none of my sell order for 250 price went through. WHY? I literally saw with my eyes that the price went up to around 270 for good 6 seconds which means actual stocks were sold and bought at that price. What was going on exactly?