I think that's the original max supply cap which was supposed to be all PoW.  That got cut down to the ~5 million we have now so I'm thinking those websites never updated.

That said, I think BK will in fact go towards that original max supply cap to stay honest but it will be some PoS scheme so the dilution then will go into the pockets of those who currently own the 5 million coins supply which makes the coming dilution a big reward for current shareholders.