I am afraid I could not completely understand your code - you are using the confirm dialog but its purpose is to determine whether the user has answered with OK or Cancel. This should be checked by checking the argument in the callback function and I did not see where you are doing this in your code - your code does the same no matter the user clicked OK or Cancel. I think that the best way to proceed is to open a new support ticket and send us a sample, fully working demo project along with detailed reproduction instructions and detailed explanations of the actual and the desired behavior. Once we better understand your scenario and we are able to analyze and modify your code, we will do our best to help you resolve the problem.
the Telerik team
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