As far as HBO & Cinemax, are you sure you're not getting a neighbor's VOD? That would certainly explain them going on and off. Otherwise, you normally shouldn't even be getting those channels if you're not paying for them. Some people get subscription channels for awhile when they first get cable, but they usually cut them off before long.
Anybody else experience the above? I am hesitant to admit it but now and then when I rescan AUTO on my HDTV ATSC tuner these channels show up. Furthermore, it is definatly Showtime and Starz on demand and the movies will stop, start again, freeze and blink off without any ryme or reason. I am doing nothing illegal as I just have the cable straight thru to my TV with HDTV tuner on board. No converter boxes.