Great....

I requested my first two books and they were lost in the mail.  Got my credits back and requested them again.  They are marked mailed now.  I just noticed it's from the same person that they were lost from the first time?????????? 

Hmm, maybe they were never mailed out the first time?  Or maybe the books were returned to the original poster for insufficient postage or some other reason?  I think if this happened to me I would pm the sender, just expressing concern that your original order was lost and to ask if they could please pm me (as well as marking mailed) when the books went out.  Or maybe there's another explanation.

   I would pm them too.  Very curious!!

Hmm..that is strange.  I occasionally end up with more than one copy of a book (in one instance I had 3 copies!), but it's certainly not the norm.