Okay from this article http://www.vladiball.org/index6.htm
I found the answer for 1. and 2.
The arms position determdetermines how quickly you fall and therefore in 1. one of the flyers will end up below the other one
I assume that in 3. one of the flyers will fly slower because of increased drag and therefore end up behind the other one?
How about tight stance vs wide stance, anyone that can help me?
I'm always single when I'm tracking so I don't have anyone as a reference, all people on my DZ are in to freeflying heads down