"Aircraft assigned "Takeoff from ramp" or "Takeoff from parking hot" in the mission editor will spawn in one of the 16 parking locations listed based on the sequence it was added to the carrier.
In a multiplayer mission, parking spots are assigned based on when a client joins the server."
I wonder what they mean by "...when a client joins the server."?? Is that when they click on Join to actually join the server from the multiplayer screen or when they click on an a/c slot after the mission loads, or when they click on Briefing, or Fly???

Could you be more specific about the posts you saw in the forums about "Delayed Activation"? Are you talking about client flights?