Even if you have multiple homes, all of the homes belonging to your household must be on one HomeExchange account.
You are able to have as many homes as you want on your account. Simply click on "Add a home" under the "My account" menu found at the top right of your page.
The GuestPoints earned upon the creation of a HomeExchange profile are awarded only once and cannot be transferred. All efforts made to bypass this rule (false friend referrals, the creation of several accounts by one person, etc.) are prohibited and could result in your account being deleted.