You cannot change the order of the appointments in MonthView with the current version of RadScheduleView. This feature will also not be available in the Q2 2011 release, that is scheduled for the next week, but we will definitely consider it for the upcoming releases.
the Telerik team
Register for the Q2 2011 What's New Webinar Week. Mark your calendar for the week starting July 18th and book your seat for a walk through of all the exciting stuff we will ship with the new release!