Just had the same experience with booking Grand Champions in Indian Wells over Memorial Weekend. I always check rates up until the last moment to see if there is something better and found an impressively low rate for the last day of our four night stay. When I tried to book it all together, it gave me the higher rate. I called GP and they booked it with the lower rate for the one night! Also found a lower breakfast included rate for the other three nights at $20 cheaper than our originally booked rate.