Sorry, but I couldn't correct those models . The textures look fine and also the model looks as it should in milkshape so I don't know what could be causing their face distortions. But I managed to bypass the problem by giving them face armour.
That is the quick solution, another would be to import faces from another unit. To find out what's causing those distortions, I suggest you write in the mod workshop. Someone is bound to know what's causing them. Or I can send you my files if you like my solution.
Same story with the archers so I just removed those Christmas trees from the top of their helmets.