Hello,
I had same issues yesterday and today. I had some short positions on ETHEUR yesterday till ETH was on its low of 117€. When it began to rise I did a 100% close order first with a limit. When the Limit order was not fulfilled, I executed a market order but even this did not make the trade. I lost about 1.5k € and was wondering if I did some mistake. Its really bad because i had 25% profit when it came to 117€. I tried to minimise the Damage but after all the Order was closed at 142€ and a total loss of 1.5k€.
Today I wanted to close a short position. It was closed but directly after, the same close order was executed again, so that i had an open long position. I canceled it directly but there came a new one. This happend many times in just a few seconds so that I logged off and in again. After that it worked again but I had 4 open positions!
Something is working really bad!