I noticed something particular about these cards and decided to ask the experts and started a topic over on PSA website and got back an interesting answer.
As you can see below there are 2 varieties of the cards what I call old stock and then new stock. There is only 2 ways this could have happened either 2 printing happened or 1 is counterfeit.
Here is the PSA forum for full read if you have anything to add please post here or there and maybe we can get a better understanding. Until then we might all have to get 2 copies of probably the rarest card of the 70's.