Fringo Halloween special

Why are there 5 sets of fruits that require 3 daubs each in the new Fringo Halloween, when regular Fringo for 1M coins only has 4 sets? And if you steal someone’s points, do they get stolen from a particular player or is it totally random?

Personally, I don’t like stealing points, but I have to use them to get to the next power-up.

And one other question, why are some power-ups only good for the higher costing islands?

Thanks