Ok, Reggie, I'll play devil's advocate.
"How do they misplace it in that scenario? "
What if when the band went to shoot the photos, the people back at the party put in another CD, and placed the CD in a place where it wasn't found. Therefore it was misplaced or lost. Potentially they had no control over what happened to it once they left it somewhere.
I have a hard time believing this was intentional. If the band wants to leak something, they have 10,000 contacts who would know how to either, put it online, or get it to the radio. Also, those contacts would be able to leak 'certain' tracks like what happened on POP, therefore preserving the uniqueness of purchasing and hearing the album for the first time.
The biggest evidence to go against the fabrication theory is that the head of Universal Music UK actually made a statement about this. It would have NEVER gotten that far if it weren't true.
It's either lost, stolen by someone who doesn't want to share, or it was fabricated. I have a hard time believing the last two options.