Backtesting with Netting account not working

Hi

I am trying to backtest a strategy using cTrader with a Netting account I have. However, I notice that positions are not being netted. For example, in the backtesting tab, if I execute a market buy EURUSD 1 lot and then execute market sell 1 lot, I end up with two separate positions as opposed to a netted nil position. 

Is this a deliberate feature? Is there any way I can make backtesting function work by netting positions?

Thanks