If you happen to get a ticket because your auto registration has expired. And you immediately correct the issue. And you get the documentation in the mail. And you wait a day so you have someone to watch your children while you go to the next town to visit the DA's office. You just might find that you have to come back later because your ticket isn't in the computer system yet.
I guess that's why they give you 2 months to get it updated. Or so I've heard.