On 10/28 I was supposed to be upgraded on my flight from SAN to IAH.I hadreceived an EUA 5 days in advance. When I got to the aiport and checked in 1 and 1/2 hour prior to the flight. Somehow the upgrade was lost at checkin. It had been there but no more. I had to ride in the back of the bus. What really twisted the knife was F was in a BF configuration. They gave me a coupon for a positive space upgrade, but they are almost useless to a plat. This ever happen to any one else. We Care2 basically said "stuff happens."