Missing paintwork at the bottom of the bags ???

Missing painting at the bottom of the doors ??? Hello, I noticed today that my 4 doors are not painted at the bottom (you can only see the gray primer, no color). Description of the place : When you open a door and look at the front side, where the snapper is for the lock, you can see a sheet about 10 cm wide, which goes from the top (window) to the bottom and is in principle the “floor” for the door. Laterally it is painted in car color bi But if you lay under the open door and look at the sheet metal, it is only primed and not painted. Is that normal? Does anyone else have that or is the door completely painted with you? I think that this is a reason for an advertisement, or ? Greeting Nik