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This makes me think that maybe I have an issue with my login - maybe I used the wrong one? I have no idea what my other one was but both are attached to the same email address. I'm so confused!
You have two separate email address settings at WordPress.com. Have you entered two different email addresses at these locations (see below) or have you entered the same one at both locations?
Blog notifications for the admin (like comment moderation, Likes, new subscriptions, etc) are sent to the email address at Settings -> General in the Dashboard.
Personal notifications (like comments on your post, subscription emails, and upgrade renewals) are sent to the email address at Users -> Personal Settings in the Dashboard.
See also > Issues Changing your E-mail Address > http://en.support.wordpress.com/email-address/#issues-changing-your-e-mail-address