Sorry for bumping an old thread.

Just realized a mistake that I just made. I booked 1 reward night in Jakarta today and had an early check-in while waiting my business trip to Europe.. Just realized that the check-in date on my business trip in Europe starting on the same date with my reward night stay; which is on July 1st due to time differences between Jakarta and Europe.

I believe the reward night would be posted first. But what will happen to my stay in Europe? Would it be deducted for 1 night or would be fully posted or would be failed to post due to the same date with my reward night? Thanks!