Do you mean you do one one day and then another the next day and you record over the first. If so you have to remember when you set the timer up for the second show that the red indicator is set to a blank space on the disc, ie. press the down arrow on the remote until the indicator won't go down any more. Not easy to explain I know but you'll get the idea as soon as you see it, I did the same thing until I got the hang of it.