Chapters are skipping back a few seconds

Hi guys, my father bought a panasonic video-dvd recorder DMR-ES30V. He can record straight off the tv with no problems. When he tries to record from a VHS video he starts to run into problems. It records ok but when he watches it back it jumps back about 10 seconds every time it goes onto a new chapter. Can anybody tell me where he is going wrong?

Thanks in advance guys.