2X for Uktra Free For All

so it mentions that you gain 2x points if you attack town halls within 2 levels of yourself. So: let’s say I am town hall 16...
I attack 13 - I get 1x points
I attack 14 - I get 2x points
I attack 18 - I get 2x points
I attack 19 - Do I get 2x points? I would believe it would be 1x based on description

What is the purpose of giving these 2x point bonuses?
I feel like it would be better if it were given if attacked same town hall or higher...
Not within two?