Beyonwiz DP-H1 - Manual (Page 68)

STB & PVR Function
58
NOTE
z
The new recording has higher priority than the existing recordings.
Therefore, when a new recording starts it will stop one of the existing
recordings, which ends earlier respectively, if there are no
confirmation or cancellation.
z
You may not notice the warning message so make sure you organize
the timer list properly specifically if you are recording a very
important program.