Never had this happen before, let me explain. I was booked for 5 nights at the Waikiki Beach Marriott Resort, made the booking about a month ago (followed up with an email and a reservation confirmation number). Went to online to my Marriott account last night and to my surprise my reservation was gone. I phoned the Marriott Plat reservation line and the nice fellow said it looks like the Hotel cancelled your reservation. He confirmed that I did have a valid reservation and was just as surprised as I was. He phoned the hotel directly and they rebooked my reservation but didn't explain what happened.
I then went online again and now there was two reservations (two rooms) for the same dates. I ended up calling the hotel myself to cancel one of the rooms so as to not incur a "late cancellation penalty". After it was all said and done I asked the hotel reservation lady any idea what happened? she mentioned sometimes this happen's when you don't have a CC on file, which would not apply in my case since my CC is always on file, other than that she couldn't answer why.
Anyway I'm really glad I checked my online last night, to show up at the hotel at 11pm (late flight in) and to not have a reservation would have not been nice, read: tired & weary after a long flight.
Anyone else run into this glitch? and if so any idea why?