Please, see the subject.
With some numbers combination I can see all charts, with some can't see at least one.
Most of the cases (6 from 10) it works...
Is it normal? :) Telerik rules?
I've noticed when the upper chart has bigger value than lower (vertical style) - it doesn't draw the upper.
Otherwise - draws all.
Same with horizontal - left=upper, right=lower - doesn't draw the right one
Also, using Drill Down chart when I click on a chart and display next diagram, then active areas are same as on parent chart.
RadChart doesn't reassign new active areas on new chart.
Same's on ya example: