I wasn't able to find anything on a search, and am relatively new to the Marriott program, so hoping I could get help with a question.

I'm looking at a couple of different properties for a one night stay in Bangkok in Dec. At this point, not sure if I want to splurge on the JW (or Ren, maybe) or just book at the Courtyard.

If I were to make a reservation (refundable - likely AAA rates) at two different properties on the same night, will one get automatically canceled? I'm not planning on canceling anything last minute - I plan to cancel whichever one I decide not to use well before the stay date, but I understand December is high season in Thailand, so also don't want to end up paying a higher rate than they're charging now. If I put one of the reservation's in my wife's name instead of mine, will this change anything?

Any thoughts or experience?