Looks like you sorted it, a whois shows it valid for another 12 months.
If you had let it expire then it takes a while for the renewal to get registered across the web. Depending on your ISP this could be anything from under and hour to over a day. This is nothing to do with Bravenet, it is just how the web works. I always recommend renewing domains at least a week before expiry.
Try these steps:
Select the domain name you want to use.
From the Renew icon, select Renew Domain.
Check the box if you would like to ConsoliDate your renewal date.
Click Finish and then Checkout.