Order of Positions

[nash123]

Today, I saw something, that makes me crazy...




Is there any meaning on the orders of the positions?
First, I thought, it's only which position they currently play, but it isn't.
I also thought, it's only the order, who they learned it - but it isn't it. I looked at this guy and he could play ST/AMR, I learned him AMC...


Maybe it's their favorite position?

Are their experience?