I've had this happen a few times when requesting a book. It seems like the "sending" member takes a long time to get a book in the mail.... and when I click on "details" the "date requested" actually changed. For instance, I recently ordered several books on the same day - about 10 days ago. All were mailed, except for one. Now I see that the member has printed the wrapper, but the "date requested" changed to yesterday's date? This in inaccurate and I can't figure why that date information would have to change?

If the first person  you ordered from doens't respond in 5 days or cancels, it goes to the next person who has the book and the requested date is then the "new" requested date.

Yes what Lita said. You can go into your transaction archive to see if it was canceled and reordered from another member.

It sounds like it timed out for the 1st person and then the 2nd person got the request and already accepted and accessed your address.  The first person could have accepted the book and canceled for some reason sending the request to another.