Strange behavior of the trading platform

[EstefanTT]

I just tried to roll over my shorts and something very strange happenned

I made a buy order of X BitUSD at 227 bts and a X bitUSD short order to 227 bts too.

I confirm both at the same time but only the short is done and the buy order remain there ... the highest buy order was at 226 and the lowest sell order was at 230.

I ask about to another member of this commmunity if he knews how it was possible and it happenned the same to him. Someone "invisible" bought his BitUSD freshly shorted directely before he could buy them to himself.

I made a last test to be sure, I tried one more time with 1$. I entered first the buy order, it appears at the top of the buyer list. Then I create the short order, I confiremd and ... POUF ! the same happenned. My buy order strayed intact and the short get bought by another invisible someone.

Another weird thing is that both shorts showing in the "COVER" tab are showing (exactely) only 90.7% of the value I enter when shorting. For ex. on the 1$ I shorted I have 9.07$ in the cover tab.

I would really apreciate some light over that situation.