You should be able to pick what Axis/Direction an RCS thruster is assigned to.

This has been something thats been bothering me for a while when I try to make cool RCS configurations that aren't just 4 thrusters on a block, the game doesn't seem to know how to handle odd RCS configurations. Let me explain: the game probably has some sort of algorithm that decides what each RCS thruster should do when you decide to... lets say pitch up or down, it knows which should fire to make it spin/move the way you want.. well that algorithm is kind of garbage when you try and do more then just having an apollo CSM-style RCS configuration and there should be an option that lets you decide for yourself which thruster does what which is something that KSP lets you do... I know you can use vizzy to do something like this but learning programming is not on my bucket list as of right now.