Registering a domain and hosting one is often mistaken by a lot of people to be one and the same thing. They are in reality 2 separate services - the domain address registration is the actual name and nothing else, while the hosted domains feature shows the amount of already registered domain addresses that one could accommodate in the same hosting account and have website files and emails for them. Your sites will function in exactly the same way no matter if the domain names are registered and hosted in one place or are registered with company A and directed to company B. Simply registering a domain name without hosting it will give you ownership, but will not enable you to have a website if you don't host this domain address in some account so that records for it are created and it starts opening the information from that account.