Big_Mac 说:
Vertically? So theyre all standing on one anothers shoulders? A screenshot would be nice
No, that would be an interesting bug but unfortunately it isn't that

. I'm sure he means that rather than forming a line which is perpendicular to the direction that the enemy are coming from, the archers form a line that is
parallel to the direction the enemy are coming from. So you have one archer behind the other.
I have seen other people mention it, and it happened to me occasionally in beta Custom Battles. It hasn't happened for me yet in the release version(s).
EDIT: BobSels, are you using version 1.105? If so I recommend posting this in the bug tracker:
http://bugs.taleworlds.com/. The password and username are just the same as you use to log into the Taleworlds forum.