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It happened to me, too. I was about to go off on somebody, too...lol...until I saw the expiration date. The new card was atop of the kitchen counter still in the envelope that I had not yet opened....#smh.my bet is on expired.. Mine did the same thing a few months back..
My credit union is canceling my card and reissuing it because of the Target hack. Now I have to go thru and fix all of my auto-billed accounts. I guess I'll have to add iTunes to that list.