Icmarkets is weird. XAUUSD opened a sell position at 1777 but jumped to 1778. When I closed it, ended up losing money.

My master found something strange in my ic markets broker. I placed a Sell order at 1777 but suddenly it became 1778. Immediately turned blue profit, but when I closed it, it turned red loss. Very strange, it happened 3 times. Be careful with this broker, I've also found some strange things on their chart, the price jumps around. I once caught ic markets jumping from for example xauusd 1800 to 1700 in 1 second, 1000 points in 1 second and then back to the original price, 1000 points in 1 second. On the way to change brokers.