I had a book requested then they send a pm telling me it was a mistake and to cancel it. I had not even accepted it yet why didnt they just cancel it ? Weird to me.
It wasnt wish list, I sent them a pm to cancel it maybe they were new its hard to tell.
Yes, if you cancel, the server will request the book from the next sender in line for them. You "done right" by telling them to cancel from their end.
Thank you for your patience