As of now, all CS are pooled together. Your card will tell the CM's how many adult vs children you have on the plan (in your room) as a whole. The TS are already broken down adult vs child.
You receive the number of credits for adults and the number of children on your plan, they are not transferable according to Disney. When ordering you will be allowed to order the types of meals (adult or children) according to what is on your card.
This topic tends to get heated here on the DIS. Because it has been closed in the past after it has gone horribly wrong, I am closing it now. Thanks for understanding