Hello Art Kedzierski,
Currently RadChart does not support overlapping of bars, however, you can achieve this goal using stacked bars. What you need to do is having both bar series ( Sub and Total ) in the same stack in order to be drawn above each other and also modify the data, so that the Total bar displays the correct value, instead of adding it's own to the value of the Sub bar.
Please, review the attached sample project, which demonstrates how to create such a scenario.
Hope this helps.If you need further assistance, please, do not hesitate to contact us.
All the best,
the Telerik team
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