PvP for certain worlds? (worldgaurd)

I'm in the progress of making a factions world and a survival world. But before i install factions i want to make sure that PvP is enabled there and PvP is disabled in the survival world. Also, i am having trouble with having seperate rank ladders in each world. I made a rank ladder for the survival world, but if i set myself in that rank and go to the soon-to-be factions world i am still that rank!

Here is a link to my permissions.yml if needed: http://pastebin.com/Uat7fGXW

Btw: the ladder for the survival world is called "towny"

I also have not made any ranks for the factions world

EDIT by Moderator: merged posts, please use the edit button instead of double posting.