I got order on a pair coin like bye ETH/USD, in lower price. so if it has performed, my transaction have had ok. all mentioned transactions were performed but they have cancelled them and get my profit back!!
Are those said not valid transactions are you really did it with your accounts? You remembered that you did those trades on their exchange?
This is my firstime to heard this kind of problem on a exchange.
And, this thread should be in Scam Accusation, just move the thread and let's hear some opinion of others and maybe there are some bitcointalk account owned by coinsbit.