I'm not sure if this is what you mean, but your problem may lie in the Weapon Ranges. If you look at the Comanche weapons they both have the same range. I have been having problems with this as well. I made a tank with a massive long range railgun for anti-tank and a machinegun thing for infantry. The tank would fire the railgun at infantry a long way away as it could reach them and the gun couldn't, overriding the PreferredAgainst. (When the infantry were in range, it used the machine gun) Hope this helps
