All I was saying was the FAFSA is reduced by 50% (if the students have similar assets) when there are 2 in school. Just the FAFSA, and just to calculate the EFC for federal aid. The schools can put up any type of NPC they want to, and I assume the CSS/Profile schools do put up NPCs with their specific formulas, not just the FAFSA EFC formula.
@rickle1 should be able to use the NPC for her oldest child and see what FA it generates. She knows what they got this year so can tell if the NPC is accurate. If it isn’t, then one can’t really depend on anything. If it is close, run it with 2 in college. If it is school grants, the school may ask what they are actually paying for #2 when the time comes.