It's amazing to me that people here are having such a hard time grasping this concept.
Okay people, let's try this again. PTAT records the big four every night and will hold those shows for eight days. You can go to PTAT and if you see a show that you want to watch and keep longer than the alloted eight days, then you have the option to move that show to your DVR (seperate from the PTAT) and hold it there until YOU decide you don't want to keep it any longer. It won't just disappear after eight days if you don't want it to...
It's a semantic argument... I tried explaining this in another thread. I was eventually banging my head on my keyboard...lol