Registering a domain and hosting one is frequently mistaken by a lot of people to be one and the same thing. They are in fact 2 different services - the domain address registration is the actual name and nothing else, while the hosted domains feature shows the number of already registered domain names you can accommodate within the same website hosting account and have website data and email messages for them. Your websites will work in precisely the same way regardless of whether the domain addresses are registered and hosted at the same place or are registered with company A and directed to company B. Simply registering a domain address without hosting it will grant you ownership, but will not allow you to have a website if you don't host this domain name in some account so that records for it are created and it starts opening the information from that account.