You can. We own both BLT and BWV. We did this so we could book each resort at the 11 month window. We originally owned just BLT, but wanted to have a better chance of getting either SV or BW view rooms at BWV when we do our summer trip which is always a split stay.
Now, we can book the BWV nights with BWV points at 11 months and then the BLT nights with BLT points at 11 months, instead of having to wait until the 7 month mark to both.