Liteon 5007 manual recording issues

I have a Liteon 5007 dvd recorder. I use the manual record feature because I have directv and it doesn’t support the tv guide. My problem is that the recorder seems to go off 1/2 hour before my show starts and only records for 30 minutes even though I set the record time for an hour. Any clue why this happens?

If you are using the timer recording function you have to shut off the 5007 before the start time of the show / start time of the timer setting. Is your clock set correctly? Is there another timer recording that overlaps the times you chose? Just trying to figure this one out.

I have tried leaving the machine on and off and the same issue. the clock and date are set correctly and I only have the one daily recording scheduled. I keep trying things but so far, the same result.