Why doesn’t total commission MT4 Manager GUI shows on a specific day match with the commission Tapaas shows?

Tapaas posts the commission when the trade is opened (which incidentally is when MT4 charges commission as well). However when MT4 Manager GUI is used to view trades for a particular day, it also shows commission associated with any trade active that day, including commission which was incurred on previous days.

On Tapaas Alpha Lite EOD Snapshot History dashboard for example, when a specific day is selected, Tapaas will show the commission which was earned on that specific day only, whereas if the same day was selected on MT4 Manager GUI Report, the total commission displayed will include commission associated with trades that are active on that day as well (if any).