(help) units not showing in spectator, not acting. *oh god what have I done?

[arthur2shedsjackson 0]

ok, so I got the helicopter to escort properly, then I turn around and he's stopped moving at all. I look for him in spectator, and him, and his gunner are not showing in the entity list at all... they're like ghosts. I've tried deleting the unit and setting all it's waypoints again and he wont budge, i'm stumped.