I remember I use to have this same problem long ago when I first started playing Shockforce. I have shockforce and Marines module. I love playing the Quick build missions.
The problem is that everytime it puts me in game, the auto build of my Marine army is totally dumb. IE all Tow missles soldiers, or all Humvees or all transports with no troops.
How come this issue has not been fixed? Latest patch etc. No matter what I choose for armies, mix, tank, inf, etc. My units in game end up being some totally insane build that is not realistic nor helpful.