unresolved question about tax assessor history

This never got fully resolved. Please advise on follow up question ....

https://docs.deweydata.io/discuss/69c43284b0026f19263e492a

BTW - I can't upvote because when I try to login, the system sends me a link to login to my email but when I click on it, the system says this link has already been used. I've tried like 5 times.