AAA website

When trying to autologin to https://www.aaasouth.com/Common/Login/Login.aspx a problem occurs. There appear to be 2 submissions of a webform on the same page, where one is used to register, and one is used to login if already registered. When you autologin, lastpass fills the form and submits, but the site appears to believe that the form to register has been submitted. If I just autofill and manually submit by manually hitting the login button, I can enter the site just fine.