Is the combination Stacked Area Series on TimeXAxis not supported, and if not, why not?  Area Series in supported on TimeXAxis.  The page at https://ko.infragistics.com/help/winforms/datachart-series-requirements doesn't appear to include StackedAreaSeries.

Secondly, when stacking two series, and one value is negative, why doesn't the total include the negative value?  This seems like a bug to me.  E.g. 

public AccountValueHistory()
{
this.Add(new AccountDateInfo { date = new DateTime(2023, 1, 1), Acct1 = 0, Acct2 = 30 });
this.Add(new AccountDateInfo { date = new DateTime(2023, 2, 16), Acct1 = -50, Acct2 = 30});
this.Add(new AccountDateInfo { date = new DateTime(2023, 2, 25), Acct1 = 50, Acct2 = 60 });
this.Add(new AccountDateInfo { date = new DateTime(2023, 2, 25), Acct1 = 70, Acct2 = 60 });
}

produces:

The second date should be -20, not 30.