From the Motorola Website:
Why is my phone showing a different screen?
If you notice that your phone is displaying a screen that you are not familiar with or your backlight continuously stays lit even when you have adjusted the backlight settings your phone may be in close contact with a magnet.
There are certain components within the phone that when placed in close contact to a magnet will trigger a different screen configuration and cause your phone backlight to stay lit.
Tip: Several phone holsters contain magnets that may also cause your display to change and your backlight to stay continuously lit.
This is not a defect of the phone.