It was guaranteed and I rarely make a reservation without it being confirmed. I only do that at hotels I am a regular guest at. I'm usually upgraded to a suite at those properties anyway.
The FD agent asked if I would accept a King bed instead of two doubles/queens (I was with my sister on this trip visiting my grandma) and I agreed, but those were all occupied as well. She picked up the phone and called the Wyndham next door and said she had a reservation she couldn't honor and gave my rates when asking if they would match it. She then told me to go to the Wyndham and I would still get the stay posted to my MR account.
I've never experienced this direct issue before, but on two occasions I was given rooms that were hardly acceptable in terms of accessibility (ie: toilet between a wall and the sink with no space for a WC) and the hotels have refunded the stay.
I'm appreciative that an alternate hotel was arranged, but I also believe in my Platinum guarantees being honored. The hotel knew about the reservation three days in advance. I doubt all the other accessible rooms were occupied by fellow Plats and they chose to walk me.
Am I being too much of a DYKWIA?