They're seperate for each area. Same for the max of 99/99 you can get in them. Each gives different loot too

First you get to 30/30 for the base Padjali weapon, then you need another 60/60 to spend on it to upgrade it to Kinna for Palace of the Dead

Everything in the game can be used as glamour, as long as it's a lower item level than the item you're glamouring over. (ilvl 130 weapon can be glamoured over anything higher, but not anything lower than it, so you can't use many things at low levels for glamour)