End is cut off when I record the next show on the same channel with DVR

Let's say, I record a show from 9:00 to 10:00 and the next show from 10:00 to 11:00, both are on the same channel.  The last several seconds of the show ending 10:00 is cut off, even if I extend the ending time by 1 minute since the recording of the next show from 10:00 already started.  It can't record both at the same time if they are on the same channel.  I saw some people had the same problem in this forum long time ago but still no solutions.  Could it be solved if I change or fix the DVR?  Mine is Motorola's.

Thanks.