IS there any place where this email may appear or be accessed via the mail server? Have a look in the mdl_user table, while mcmiller@olong.org may appear for you, Mark, is there another designation you may have like admin, or admin user? My first guess would be yes, and that is the email address being used. If you look in the table itself, and find that gmail address, you can change it manually using phpMyAdmin or equivalent for you database.
General help
email address in Self Registration emal to user
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