Did you send email to promotions and received a response stating that you are allowed to register before actually registering for the session? If you did then you are fine.
Both emails you received seems to be only after you signed up. The one being the auto generated one, and the other being the confirmation that also gets sent to everyone registered for the session. But you never received a response on you first email sent to promotions to obtain authorisation to attend the session. Therefore judging by what you stated I believe that you are not yet authorised to attend the session. The might let you attend anyways, or you might spend a lot of money on travel arrangements and be sent away when you get there. This is why it is very important to first wait for the authorisation to register before actually signing up for a session.
Both emails you received seems to be only after you signed up. The one being the auto generated one, and the other being the confirmation that also gets sent to everyone registered for the session. But you never received a response on you first email sent to promotions to obtain authorisation to attend the session. Therefore judging by what you stated I believe that you are not yet authorised to attend the session. The might let you attend anyways, or you might spend a lot of money on travel arrangements and be sent away when you get there. This is why it is very important to first wait for the authorisation to register before actually signing up for a session.