I have experienced this myself. I remember ordering a
few books from an online site and getting an email letting me know that one of
the books was not in stock and had been placed on “backorder.” I
was given the option to cancel the backordered item, but I wasn’t in a
rush, and more importantly I wasn’t able to get it anywhere else so… I
waited. It eventually came in the mail.
The rest of my order had already arrived. And had I
not known about the backorder I could have said, “I can’t believe they forgot
one book!” I might have gotten mad or frustrated and started complaining
about the company.
Even though the item wasn’t readily available it was
allocated to my order. As soon as it became available, it would be
forwarded to me. It was definitely mine, even though I hadn’t received it
yet.
Can you see where I am going with this?