I see no recourse other than closing my account, if that's still possible.  No, not even that is possible.
After adding the email address and clicking save, logging out, and logging in, I found the email address was successfully added. At this point I could change it to the primary one, click save, paste my password, and click the button on the password prompt to successfully change my primary email address. If I tried to add the email and make it primary in one session, it would not work. If I entered my password and hit enter, it would not work.
Character not recognized. Please choose a mix of letters and numbers.