I called Best Western rewards for you.
It is okay if it's consecutive or separate and you're right simultaneous is not mentioned. So below is what the lady at rewards phone number told me.
It depends on how you book the room and if you use the same rewards card number that is if you use your same rewards account it should be okay but call rewards and verify because the hotel has no control over that decision. In other words the lady said don't believe the front desk call Best Western rewards.
Also the rewards night is good for 5,000 points to 70,000 points, which means you can use a 70,000 points to stay at free night in Disneyland or Las Vegas if you like,