I not sure if this is a bug or not, so I ask. I include a video to see it in action with me explaining.
http://www.youtube.com/watch?v=K2JH1YMgU4Q&feature=youtu.be
Basically I have a trigger with player grouped to it... and a civilian on a hold waypoint... i sync the hold to the trigger, and it works fine.. Down the path of the waypoint is another hold, with another trigger that player is grouped to.. When you sync the civilian hold to the trigger, it breaks the initial hold trigger first placed..