I am playing around with account manager in Amibroker, but I noticed that under "Equity History", the "Open Pos. Val" value already has commission subtracted off. But when I buy a stock, the "cash" column also updates with the commission subtracted off again. This makes "Equity" less than what it should be.

However, under the 'summary' tab, the market value of the shares show up correctly, without double counting commissions.

Anyone else experienced this?