Registering a domain name and hosting one is frequently mistaken by many people to be the same thing. They're in fact 2 separate services - the domain address registration is the actual name and nothing more, while the hosted domains feature shows the amount of already registered domain names that you can accommodate in the same web hosting account and have website files and emails for them. Your sites will function in exactly the same way regardless of whether the domains are registered and hosted in one place or are registered with company A and pointed to company B. Simply registering a domain name without hosting it will grant you ownership, but will not allow you to have a web site if you don't host this domain address in some account so that records for it are set up and it starts opening the information from that account.