Justin:
Is your application using AJAX? If so, you should reference the
Interacting between RadCalendar and RadScheduler and reference the post by Peter from Telerik (October 27, 2010) which states:
"If you use RadAjaxManager for this case, you should make sure that RadCalendar updates RadScheduler in the ajax settings". and provides the .aspx code for this.
Hope this helps!