How is the Books Received calculated?

I have received 24 books.  My transaction archive says I received 32 books.  I cannot figure out the accounting? 

This is a group of 7 orders:

 3 books were cancelled due to "no answer from sender after allotted time.

1 book I never received was marked lost.  

1 request canceled by sender.

2 book orders cancelled during the one hour buyers remorse time. 

If I add the 7 to the 24 I get 31.  How do they get 32? 

I think I got it figured out.  I think they are not counting the RWAP book that was resolved and I did not ask for my credit back.

So I received 23 books.

I think they count Mail-to-a-Friend, when you can mail books to anyone, members and non-members.  PLEASE DO NOT CONFUSE THIS WITH POST TO A FRIEND, that's a different feature.  

I guess that makes 32. Whew!  If this is so, why do they count books sent out also as books received?  Not a big deal, just a Brain teaser.