well if you know some E&E guy he can explain to you what does it mean by screen bleeding...

Its an effect due to bad assembly, the screen shouldn't have shown obvious.
Although in actual those who didnt suffer the bleed in actual have the same amount of LED backlight but it was assembled nicely on the wall.

Apple may take back the unit and claims from the molding company who didn't do a precise job on the mm/nm measurement.