Anyone can explain me what going on here

I open a sell position to protect my buy position but my position all close in the same time with different value when the market going up, what i know i should have the same amount whatever the market is up or down. Can any one pls explain this as i been contacting the costumer care and all they try explain me a basic of trading witch i know already, i just want a clear explanation of that please.

In the second of these

(-0.8800 + 0.5607)×5000 = -1596. 50

Your original buy price was substantially above the price at which you eventually sold.

Unfortunately, because of the spread between buy and sell prices it is impossible to buy 7150 and sell 7150 and expect these to create a situation that does not have a baked in loss.