Did you check your profile, not your settings? My email settings were unchanged, but on my public profile they were different and had been set to a facebook address.

I think it's easy to understate the importance of this, personally, and don't mind the multiple stories. I'm extremely annoyed at this - I don't want this email address, that I do not control, be published as some kind of contact point for me.

It's a big deal, and there's no "canonical" link, so it's not surprising that multiple stories got enough upvotes to be on the front page. Also if you had public email addresses, it hid them. That's not cool.