Hi,
The item is currently being investigated and we will do our best to fix it in the service pack release scheduled for the end of October.
Currently, the possible workaround is to set the CombineMode of the three series to None:
this.barSeries4.CombineMode = Telerik.Charting.ChartSeriesCombineMode.None;
this.barSeries5.CombineMode = Telerik.Charting.ChartSeriesCombineMode.None;
this.barSeries6.CombineMode = Telerik.Charting.ChartSeriesCombineMode.None;
Regards,
Hristo
Progress Telerik