I'm not a product expert but I have moved your post to the Total Protection Service area. Hopefully somene can help you soon.
You may need to contact customer service.
The Total protection 2010, is the actual product you bought which is indeed a 3 user license.
I request you to please contact the McAfee Home User's Customer Service at 1 866 622 3911. This team will be able to assist you in getting the issue resolved.