- Nope, not a glitch! Those are legitimate pets from 2011 c:
Basically, back on December 18th, 2011, what happened is that the re-release box wasn't adopted anywhere near as often as Nick had expected/predicted. As a result, not enough old and valuable pets were released back into circulation, since the probabilities were way off for such a low number of adoptions.
To make up for this, we got a second re-release box as a Christmas gift on the 24th.
It only happened during that year, though.^^
As a side note for the future, if you want to ask a question it's best to start a new thread, instead of bumping up a long-answered old one c: It'll make it easier for other users to see that there's still an unanswered question.
