Hey guys, just curious as to how the offline local play stats work?
It doesn't seem to rank up in terms of wins or points, as far as I can see.

Its like this

P W WL WK
Team A 12 8 50 30
Team B 12 9 45 23

(just examples.) Is there a scoring method or something here?

It's "Played", "Won", "Worms Lost", "Worms Killed". The scoring method should be just about logical there.