To establish the LZ at the top of the diamond only the guide is on board the heli. After he digs out a big enough platform for the whole group and the heli, they come up on a 2nd drop. Those tracks were made by the rest of the group during that time.
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe