This is common with the Costco package deal. Packaging states 1800x an the batteries are stamped with 'A' suffix and not 'B.'
I go into my Costco and look, but the anal Japanese are so meticulous that they rotate the batteries before sealing the packaging, so that 'Eneloop' is facing outwards and I can't see the micro-stamped date code, lol!
Anyhow, I'm tracking a guy off of Ebay who somehow got a case(s) of Eneloop/Costco 'kits' and is selling the bare batteries, bare chargers and unsealed combos. He's reporting that the batteries are indeed 'B's and so they're the 1800x gen. 3s.
They are the light/dark blue wrappers.
So they're out there, correctly packaged, is my point.
Chris