HAHA! - I'm glad I got mine. Are you sure that's the case though, because I still see the previous design in cartons at my store.
Well, my WalMart was sold out, and these were what was put there in their place.
The original WalMart-exclusive 2-pack sets were made last year. It's not impossible that the print run has run out, at least in some areas. Since we're over half-way into 2012 and there are none with a 2012 date on them, I don't think they made any more.
I pulled a pack of reds out of my pocket. The AoS code is "4111-N1632H". This means that it was printed in the 41st week of 2011, around mid-October. Yours probably have the same code, or at the least the first two digits are near 41, the next two digits are 11 and the first letter after the dash is an N. The 11 and the N indicate "made in 2011", and the first two digits are the week in 2011 in which they were printed. The rest is some sort of lot number information, useless without access to USPC's database.