I opened a contract and it was liquidated. I accepted it. It showed a loss of more than 2 USDT. Why are all the more than 10 USDT in my contract wallet gone? I don't understand. What kind of platform is this? My money just disappeared out of thin air. You can see the picture below. The picture shows a loss of 11 USDT, but the total loss of my orders is only 3 USDT. Where did the other USDT go?