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[Administrator]

when setting Me.gridDataBoundGrid1.Binder.RootHierarchyLevel.ShowHeaders = False

This causes the demo to only show one root level row instead of two (in the CustomerVirt example). That one row does have a band with with two rows in it.

[Administrator]

I see the problem and we'll have to fix that.

What you can do now is instead of setting RootHierarchyLevel.ShowHeaders = False you can simply hide the column headers for the root hierarchy by setting
Me.gridDataBoundGrid1.Model.HideRows.Item(0) = true

Stefan