Unable to change notifications to new email

I changed my primary email a few days ago on my IH profile. However, notifications are still going to the old email. Could this be a result of using twitter for auth? My twitter account uses the other email.

I had also unsubscribed from the mailing list, but it seems like I'm still getting emails on the old email. I unsubscribed again to see if it takes effect (in case the first time didn't work). Thanks!