Okay just to make things clear, it's not about the strength required to shift the gear. Moreover, it's the distance required before the shifter registers a 'Click' sound. I realized that it takes 2x the distance on the left shifter as it does on the right one to register a click. I also realized that if I move the right shifter the same distance as the left one, it will move 2 gears.

Is that normal?