This is only happening when I have ALiVE enabled.
Using a combination of DAR's Humvees and EWK's Humvees I place an "empty" vehicle unit on the map via the editor. When I jump into preview or even test on a dedicated server sometimes these vehicles have an AI gunner in them, no other crew inside. Some of the humvees have them and others do not. Upon restarting the mission some of the trucks that had gunners no longer have them and then the others that did not now do have gunners.
Any ideas?