I am a new customer and still getting acquainted with the HR20. I select a show I want to record. I go in to LIST and edit the record option to record first run only, unlimited amounts of episodes, and start 1 minute before and end 1 minute after. This is not working. It seems to be recording every single episode no mater what time it is on on that channel wether or not it is a rerun or not. How do I get it to record only new episodes?