I just clarified with member services the exact conditions of transfers with multiple contracts from ONE Membership ID:
1. If you are transferring points from THE SAME RESORT, even if there are multiple contracts under the SAME MEMBERSHIP ID, then you can transfer as many points as you want from all of the multiple contracts of THE SAME RESORT.
2. If you want to transfer points from DIFFERENT RESORTS,under the same MEMBERSHIP ID, than this CAN NOT BE DONE. Only one transfer per resort (not contracts). If you were to have 3 OKW contracts, 3 BCV contracts, and 3 BWV contracts all under the same UY or Membership ID, you could only transfer points from ONE resort(but you could use points from as many contracts you have of that same resort).
So I am able to transfer my BLT points from two contracts under the one Membership ID because they are the SAME RESORT WITH THE SAME UY.
I had this verified by a supervisor as well. Hope this clears things up.