Ok you got me, usually only one, the DM in my 3-1-3-2-1 formation. But I found that the formations and tactics actually have some effect in WE9, so I change formation quite a bit depending on the formation of the other team.
I understand why man-2-man would reset, but covering is not dependent on the other team, and should remain as part of the formation, shouldn't it? Is it not like putting your RMF to attack in two directions only for them to go back no attack?