All I know is that my shipping address hasn't changed. And my Prime shipping service went to pot literally overnight. I went from consistently getting packages two days after I ordered, to about 5 days - 1 week on average. I don't get bent out of shape over a day or two here and there. But when suddenly everything I go to buy (and I only buy things that are in stock and fulfilled by Amazon) suddenly says Free Shipping and not Free Two-Day Shipping (and the delivery estimates are for a week out), something has gone badly wrong (though my address shows it still qualifies for free two-day and free one-day shipping). My Prime Two-day Free Shipping Service has flown the coop entirely. And they want me to start paying $20 more for it.
I'm done. I've called and emailed until I'm blue in the face.