Yes, but you would need to reserve individual dates with points from one contract or the other and then MS can link them together so you won't need to move. Without a transfer, there is no way to combine points from multiple contracts for one night. MS will accommodate combining points from different contracts for use on a cruise.
This is only true when the two contracts constitute two different membership numbers. If the either pr the two contracts is an add-on of the other, then the points may be combined to make reservations - even if they are different resorts (but only at 7 months).