When a visitor to the site clicks on Registration menu link

When a visitor to the site clicks on Registration menu link (http://choicewithin.com/membership-registration/) they are taken to page with the 21 day marry yourself subscription. The click sign up and register for an account. Once that is completed they see a page (http://choicewithin.com/membership-registration/?action=subscriptionsignup#038;subscription=3) with nowhere to complete payment. If you click the registration link again and then sign up again you are taken to this page http://choicewithin.com/membership-registration/?action=registeruser&subscription=3