MCCC Story Progression won't leave my played households alone...help?

Ancestral Home Details
Unlike Sims 3 where home lots could be marked as “Ancestral”, in the Sims 4 there isn’t a way to “flag” a home lot. So, instead, I am flagging the household that lives in the lot and the household retains the ancestral nature rather than the home itself.

Flagging for Ancestral Households are not available for all Sims. Due to the fact that its purpose is to prevent Sims from autonomously marrying/moving-out/changing household names, it doesn’t make sense that it would apply to Active Sims, for example. Also, if the Sims don’t live on a lot, there is no reason to flag them as an Ancestral Household due to having no lot to be Ancestral.

Here’s some of the effects Ancestral Households have with the other modules.

When Sims get married, then will stay on their ancestral lot if there is not someone else there young enough to carry-on the family name. The new spouse will move in to the ancestral lot and they’ll raise their family there. The new spouse will be renamed to match the ancestral name.
Random pregnancies and marriages don’t work between two Ancestral Households. Those rich folk don’t like to intermarry, it seems!
Random pregnancies and marriages will not work between an Ancestral Household and a vampire household if “Enforce Vampire Homes” is enabled.
If the setting is enabled so single Sims move-out when they get old enough, if they live in an ancestral lot, they will only move-out if someone is there that can carry-on for the family.
If syncing married names is enabled, when syncing names on an Ancestral lot, all names are kept with the ancestral name.
If you try to flag a Sim in an Ancestral household as homeless, you will not be able to do so.
If you move the household that is flagged as ancestral to a new household lot, then that new house becomes their ancestral home. If you make them homeless, by evicting them from the neighborhood screen, then MC Cleaner will remove the ancestral flag when it runs cleanup on households next.
Basically, what I was trying to do here was allow you to take a family, like the “Goths”, flag their household as ancestral and there would be Goths as long as possible in the game. The only way there wouldn’t be any in the future is, if at some point, they manage to not get married/pregnant and everyone dies out. From my personal experience, there’s usually two siblings and their families living in the ancestral houses so I think that will be a lot less likely.