Some cars have separate tail lights and brake lights, some have twin light bulbs or two bulbs in one reflector. It is very common and it is not affected by age of car, it is just style choice of car creators.
That's much more like it!
Some cars I see today have different patterns for the tail lights. There seems to be one pattern for the night lights and another pattern for the brake lights that are used at both day and night.
Or
There's a dividing line. But the pattern is the same, just like this Mitsubishi Starion: