Hi,
I'm no expert ,in fact a total newbie and i was having the same problem as yourself. Then i realised that in reality the Helo is waiting for the leader of the group to get in. As soon as the leader is in it is up and away ! So i always have the group board first then as leader board last. You dont always get the best seat on the Helo of course(lol) but it works for me.
Hope its been of some use to you.