Thread:Feedback/Email notifications -- won't stop!

I started getting email notifications of thread responses this morning. I guess I had enabled this a while ago in preferences, but it didn't start working until recently. I'm getting an excess of messages though -- it seems like every time any thread on the feedback page is replied to, or when a new thread is started, I get an email. I've gotten 20 of them so far in a span of 2 hours.

I tried disabling the email notification option in preferences, but they're still coming.