I would assume that store was a ks backer based on the time line, so nothing necessarily surprising in it when packages go out sequentially.
as for:
I just bought The One Ring Starter Set from Magic Madhouse and the dice are mis-printed, I have he 2-11 ones, so how can I get those replaced if they wasn’t part of the Kickstarter?
it is an interesting question, if Magic Madhouse or some other store got the sets through ks they have the same option to get replacements in some months time.
However I have no idea if they are technically/legally liable for the correctness of the products they sell or if they just refer you to free league to implement the corrections themselves.