If they are different UY's, then they will be different memberships. That means that you can't combine the points, even at 7 months, for a single night without doing a transfer between the two contracts.
If they are different resorts, but same UY and the same membership, at 7 months, you can use all points for a reservation at any of the resorts.
Prior to 7 months, however, points can not be used anywhere but their home resort.