Yeah I went through a similar issue when the post office changed our address here about twenty years ago .... we scrambled to change Trusts, driver's licenses, CWPs and the C&R and after all of that we ended up having an issue with county property taxes on the buildings and our vehicles.
The Post Office claimed they had to do it when nearby acres were all re-zoned residential and then our road was supposed to be taken over by the county and then paved.
Twenty years later neither has happened. The road is still private and it has not been paved. We're kinda happy about that but we know it is coming one of these days. In the meantime, the address was changed twenty years ago ... oh, and they said it had something to do with the 911 Emergency Call system and the Fire Department.
Who knows.