The show calendar shows orders which are in setback idle.

<show_calendar before='2011-12-14T00:00:00' from='2011-12-13T00:00:00' limit='100' what='orders'/>

new

<show_calendar before='2011-12-14T00:00:00' from='2011-12-13T00:00:00' limit='100' what='persistent_orders'/>

Should show only orders with a run time.