I'm Jewish and can't imagine any scenario under which adding kosher salt to a non-kosher meat would make that meat acceptable. We don't bring non-kosher meat into the house, so there would never be an opportunity to add salt to it.

As for question 3, without seeing the size of the label, I can't make any judgment as to whether this is false advertising, but it does sound fishy to me. It will also make me look twice as hard at the packaging next time I buy meat at Costco. Thanks for the warning!

Mike