I don't know....hopefully someone else has the answer.

What I would do (f you can) is put the night you might cancel 2nd in the res.....in that manner, if you have to (and it is the normal 24 hours cancellation policy) could do so when you arrived.....

Logic says you should be able to do it....but too often logic and loyalty programs do not seem to have much in common.

Sorry I can't be of more help.