Admin Group & Template collection Next synchron schedule - not resetting

Hi !

I cancelled the Synchronization future schedule and manually reran the template collection against my groups - but now I went to reset the schedule and it's grayed out.  It also doesn't show my next new date.  I did try to enter a future date and time.  Even though it looks like it accepts the new date/time( getting this message "Global Synchronization schedule for Administration Group Hierarchy edited successfully." ) However - every time I look at it again - it's shows the old info on.  Also on the groups page - it show - Next synchronization - N/A.