1 and 3 sound like issues that were introduced with Q2, and are now fixed with Q2 SP1. Could you please recheck the version of RadControls you're using and send us sample code to reproduce these issues?
For the second of your questions I have created a sample example to demonstrate you how to do this. Have in mind that for more complex scenarios this could be not enough.
All the best,
the Telerik team
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