Thank you for contacting us for support. I found your account and it shows it needs to be approved manually, Our approvals department will be back in the office first thing Monday morning. You can reach them for support here http://dreamhost.com/contact/ Inregards to domain registration you are correct. Domains get billed annually unless you transfer that domain to another registrar at which time it will get billed for another year.
Helpful wiki here http://wiki.dreamhost.com/Domain_Registration
If you have any other questions please do not hesitate to ask us.