Please refer to the following forum post in which is discussed the issue: http://www.telerik.com/community/forums/silverlight/scheduler/appointments-display-order-in-monthview.aspx
Hope this information helps. Please let us know if you have further questions.
the Telerik team
Registration for Q1 2011 What’s New Webinar Week is now open. Mark your calendar for the week starting March 21st and book your seat
for a walk through all the exciting stuff we ship with the new release!