How do I use a vampire sim as a "template" to create a human sim?

Pretty sure if you add a gallery saved sim into a household via CAS, it places them as brand new sim/ as a template you can work from. So they will lose any skills or progress you saved them into the gallery with.

If you move them into a house directly from the gallery/library they will have all their saved skills, job and history intact etc. At least this was the case, I noticed they’ve altered editing households, now if you remove a sim it takes money from the household, which is new, but a seperate issue lol