Not to worry. They just got a hold of another prototype case, and not the production case.
I wouldn't make too much of the term "prototype", it's more likely a pre-production model or a manufacturing sample, near-identical to the final design.
I'm getting deja-vús of The Phantom Menace here...
When rumors about the title started to emerge, people didn't believe it.
When Lucasfilm officially announced the title, they still didn't believe it (it's a working title, it's a smoke screen etc).
When the full-length trailer was released and had the TPM title on it, they still insisted "just you wait and see... this isn't the REAL title... the real one will be revealed soon".
Then the posters arrived and eventually the movie was released, and the title was.... drum roll... The Phantom Menace.
But I'm sure there's still someone out there somewhere half expecting George Lucas to announce the REAL title, 11 years later...