When viewing a program, then interrupting it and doing something else, previous Tivo's always remembered where you left off when to went to view something else. Now when I come back, sometimes it remembers, but often it doesn't, forcing me to start watching the recorded program at the beginning. Needless to say, this is very annoying. I have a Premier 4 and this has been happening to me since I started using it. Any suggestions would be appreciated.