Thank you for you concern with RadControls.
I have successfully replicated the issue locally and it looks like a bug in RadScheduler n WebService binding when RadScheduler is grouped by resources. I have logged it for fixing and you can follow its status and vote for it here
. Unfortunately at the moment there is not an easy workaround of the issue but we will do our best to fix it as soon as possible.
Please excuse us for this inconvenience caused by our control.
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to the blog feed