Katou

I too have been dabbling with the support waypoint. My test subject is a mission with myself and a grenadier in a group. Then, I set up and ambulance synched with the proper modules. Everything works when I press 5-1-2 to call in the ambulance, but I don't know how I'm supposed to declare "Support Done." Pressing 5, 1, 6 to select "Done" doesn't move the ambulance back to its Support Waypoint. Any suggestions?