A quick search pulled up someone complaining about the same thing (see
http://ask.officelive.com/smallbusiness/qna/t/9275.aspx).
In addition, I was unable to find any information about US DOMAIN PROTECTION on the Better Business Bureau website.
Unless they're your registrar, I'd ignore it.
You can always check your current domain registration information at http://www.networksolutions.com/whois to determine the expiration date.
