Originally Posted by
Adam1222
I don't know what basis any of the conspiracy theorists are talking about what management did, but it is not unusual for obvious mistake rates to be cancelled. This has happened with OTAS and with properties themselves, including Starwood. The key is for it to be done promptly. As for legal recourse, you have none. A $310 discount is not a "low price", it's a mistake.
However, it is quite usual for Booking.com to cancel anything it considers a mistake.