That aggravates the hell out of me. I have seen it where a game will be on an alternate channel with a time listed of 5pm - 11pm and I set it to record. Then the game gets closer and they change the time to 5pm - 7:30pm in the guide and my record of the earlier listing gets canceled. Records should never be canceled due to a guide change, if the wrong thing happens to get recorded, no big deal, you just delete it. When you miss something, that's a big deal!