Negative profit (risk management stats) on break even SL

Hey,

can someone explain why cTraders shows negative profit on break even SL (see screenshot).

I noticed that when the price increased the negative profit got less negative but when price dropped more then the negative profit got more negative (from -57 EUR to -80 EUR and I didn't change the SL, it was all time like in screenshot). I noticed this huge change only on this last position, all other positions were more or less stable.

Thanks