Chikky, I hear ya sister, and I'm joining in the chorus, if you don't mind!
I have to overnight a document to an attorney's office. The address on the attorney's letterhead is a P.O. box. I call the attorney's office to ask for the street address to be used for UPS/FedEx deliveries.
Person answering the phone at the attorney's office says: "Hm. That's a good question."
Huh?!? I find it difficult to believe that an attorney's office never had to have anything delivered overnight!
I've also had to chase independent contractors for their W9 forms and have also been given bad addresses! I don't get it either, but if it's any comfort, it's not just you.

Hope you had a good vacation! I'm waiting for my few days on the beach at the end of the month!