I'm having a problem with my TiVo HD not clearing the buffer when I request a manual recording of a live show in progress. What happens is that when I record, it records not just the show I requested, but the previous show as well, resulting in a 1:00 hour long recording, and stops the show I want to record nowhere near the end of it, causing me to have to extend the show 30 minutes and stop it manually. I don't want to Clear & Delete if I can help it. Also, I tried to repeat guided setup, to no avail. I'm using Comcast cable with a single M-Card.