Aging elders DOWN to young adults?

I've "bought back" elders who have died by re-creating them again in CAS. I did this for my sim self's parents. Their ghosts were culled early on in my save and using old screenshots i re-created them and just reconnected to them my sim self as they were never dead.

This is my sim self and his mother on her last day of life in 1981:
https://i.imgur.com/9Aby65H.png

Here is his mother passing from old age in 1981:
https://i.imgur.com/S4ommiH.png

Here are my sim self's parents turning up in Winter 1985:
https://i.imgur.com/0FBokBL.png

Now in "reality" the parents in 1985 have been re-created and reconnected to my sim self with MCCC.

In the story, as it's been four years since they last saw each other, my sim self remarks to his mother that he even had a dream that she died.