AI Group Waypoints Problem

[HereIsJones 20]

I'm using BIS_fnc_spawnVehicle to create a transport truck and crew, then having the truck move to a GETOUT waypoint, like so -

  _thisTruck = [_mkrPos, 50, "I_Truck_02_transport_F", west] call BIS_fnc_spawnVehicle;
  _grpTruck = (_thisTruck select 2);
.
.
.
  _wpTruck1 = _grpTruck addWaypoint [_mkrAmbush2, 0];
  _wpTruck1 setWaypointType "GETOUT";

According to the wiki, the entire group should leave the vehicle and head for the next waypoint, but only the driver gets out and moves to the next waypoint. Am I doing something obviously wrong?

 

EDIT As is often the case, I did something dumb. I created a group and put them on the truck, but didn't assign them to the crew's group. If someone wants to delete this post, feel free.