Thank you for the attached code. I created a small project based on the code you provided. I was not able to reproduce the behavior that you describe. I have attached to this post the project with which I tested, and a snapshot of the results that I get. Please examine the demo app and let us know if you get different results.
If you keep experiencing problems with this I will ask that you prepare a small project that reproduces this issue so that we can test and investigate its origins. The only thing that comes to my mind right now is that if you have negative values - then you would not see these bars because the Minimum of the StackedDataBar is 0 and negative values are drawn to the left.
the Telerik team
Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get it now >>