I noticed there is a bug in mccc when it pulls an occult from the sim tray to fulfil roles, it loses it's occult form, so green aliens end up with white skin, etc.
and mccc does not know if a house is huge or not, I get the constant growing population of 8 sims crammed in a 2 bedroom apartments, so with time they will grow.
You'll get much quickier response and help by those questions in their
Discord server.