CD question for Audioslave fans

I just bought the Audioslave album "out of exile" (used at an FYE store)

I opened it up, and it had two disks. "Out of Exile", and "Be yourself". The Code on "be yourself" didn't match with "Out of Exile" or the case.

So did I get a great deal, or ripped off?
I can't find any information on google.