Registering a domain and hosting one is frequently mistaken by many people to be one and the same thing. These are in reality 2 separate services - the domain name registration is the actual name and nothing else, while the hosted domains feature shows the number of already registered domain addresses that one could accommodate in the same web hosting account and have site data and emails for them. Your sites will function in precisely the same way regardless of whether the domains are registered and hosted at the same place or are registered with company A and directed 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 unless you host this domain address in some account so that records for it are created and it starts opening the data from that account.