Sims 2 body shop (getting saved sims into game.) solved but not solved

I think you answered your own question didn't you? Your Sims you created in bodyshop were YAs, they will not be available in CAS in the main hoods. Added info, you can also not find Sims sometimes if you used a particular skin or custom skin you have to click the skin so you can find the right head, under heads. Go back into bodyshop and make those Sims you created as young adults into Adults, then they should be in CAS in the game.