RP4VMs - Modify Group Sets

I've built a group set with a parallel bookmarking set to 1 hour and 3 consistency groups configured in it.  I'm attempting to remove a consistency group from the group set now.  All my options are grayed out for adding/removing a consistency group from a group set.  The only options available to change are the name and the timing of the bookmarking.  Is there something I need to do to allow the changing of a group set?  I'm running 5.0P1 appliances connect to vCenter 6.0, ESXi 6.0.