I'm trying to create a Column_Stacked chart with XslIO. After adding the IChartSerie, I'm setting the SerieFormat.CommonSerieOptions.Overlap to 100 (or any value between -100 and 100). When debugging the app, even before setting the overlap property, it is already defaulted to 100. But in the resulting Excel document, the overlap on the series is always 0%, no matter what I set it to in the code.
Thanks in advance for any help, everything else is working great, just this one issue.