In Beta 1.4.1 the Shield Wall formation does not function correctly if the control group is over ~160 men.
Here Is me trying to get my 300+ men into shield wall, notice the properly held shields but they are spaced very far apart:
Then I used F7 to split the group in two, one group having 160 men, the other 176. Then put both groups into Shield Wall. The group with 160 formed up correctly, the group with 176 maintained the loose formation with shields held up.
I'm running mods, you'll see I have non vanilla troops names. However I am not running any mods that have any direct impact on combat, so I highly doubt they are the culprit.
Here Is me trying to get my 300+ men into shield wall, notice the properly held shields but they are spaced very far apart:
Then I used F7 to split the group in two, one group having 160 men, the other 176. Then put both groups into Shield Wall. The group with 160 formed up correctly, the group with 176 maintained the loose formation with shields held up.
I'm running mods, you'll see I have non vanilla troops names. However I am not running any mods that have any direct impact on combat, so I highly doubt they are the culprit.