Biff, a guy I know was successful with 5 e-mail addresses. Hes got 5000(10x500)miles so far all from the surveys. Do log-on and see if the certs are pending check the upper left hand side of the screen after logging in. He also told me that after each time he logs in he logs off b4 checking another acct.
Could be the early ones got it set up and now it cant be done.But I saw his certs to know it worked now hes waiting for AA to post it. Good Luck