Sublime to ridiculous in one "post"

This week I handed the typescript of my first book to my editor. It was a special moment for me. She pointed out that she's only the editor and I don't have to agree with her suggestions. As a newcomer to writing, I feel lucky to have an experienced editor who's worked with successful authors. So I'm not going to be 'precious' about my writing; I'm on a journey and learning all the time.

I wrote another few pages as soon as I got home. My editor asked me to send hard copy which I duly took to the post office. The woman there said my letter 'might' arrive by Monday (three working days from the date of posting) but there was no guarantee. (This was first class post.) My only alternative was to spend an additional £4 or so to send it 'special' delivery which required a signature at the other end. So if my recipient was out at point of delivery, the letter wouldn't arrive and I would have spent £4 for nothing! I decided to risk the normal postal service. Did this woman realise she was talking herself out of a job, I wonder?