2.3.5 campaign; upgraded weapons problem

[christgrindingavenue]

guys, already completed the campaign a few times now, but out of boredom, decided to have another go just to see how many hero units i could end up with etc... but i only got as far as the first mission... once i research flamers, design a viper/wheels/flamer, and attempt to build one, the body points are rediculously off the scale... making it impossible to create one...
because i dont use flamers so much, i decided to wait until i researched twin machinegun, but same story for a viper/wheels/twin machinegun...
i'm sure that theres a simple fix for this stupid little glitch, but i never really took the time to learn much about troubleshooting or modding warzone...
any help would be appreciated :/
cheers guys