When editing a hosehold in CAS the game places the sims in a particular order. It might have something to do with the werewolf-sim's placement within the household. I'll keep poking around but there's definitely more to this than 'don't use console commands'. Is it because I had C bitten by Rory but I had A bitten by C? But I cannot get his werewolf form to work properly. I always exit CAS without saving because I don't want it to be behaving that way.

If I have him transform into a wolf first and then take him to CAS it will generate a random (and broken) human form for him: (see attached). Every time he transforms he has the same dark-coated wolf form, but when I take him to CAS the game generate a new random wolf form for him and it has his tattoos on. Despite taking A through the gameplay of becoming a werewolf, no cheats, I cannot get his wolf-form to stablise in the same way. Furthermore when I edit her in CAS she always has the same werewolf form as I see in game. On her first transformation she got a white-coated werewolf form and none of her tattoos, scars, skin details or makeup showed up on her werewolf form.

This gave C a stable and usable werewolf form. With the idea that maybe this is caused by using commands/cheats to turn sims into werewolves I took two of my sims through the trouble of getting bitten to see if that would help.