I see the problem now and sadly, I don't see the solution for it in their info page. I'm thinking that they have a format for adding 2nd composition to the node that I don't know yet so if you see Nanamin or Ckwg (via his wall) you can ask them regarding that. Otherwise I'll probably see Nanamin in 4-6 hours from now and I'll ask him about this and the AS calculations.
For CA, you would get more firepower out of 20.3cm guns. If you look at the CA Stats Page, you can see the stats on K2 models are much higher. This is important because your damage is going to be much higher with higher stats. This is because the stats are multiplied by a factor so that they can overcome the high shields.