Registering a domain and hosting one is frequently mistaken by a lot of people to be the same thing. These are in fact 2 different services - the domain name registration is the actual name and nothing else, while the hosted domains feature shows the number of already registered domain names which you could accommodate within the same website hosting account and have website files and emails for them. Your sites will function in exactly the same way regardless of whether the domain addresses 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 until you host this domain address in some account so that records for it are created and it starts opening the data from that account.