Didnt see this posted anywhere so i apologise if im bringing up something thats already been posted :

when i try playing the last levels on swamps, its saying i have to buy the ancient swamps campaign (which i did the day it came out) and i also read somewhere that i also have to play the entire campaign from start to finish (which ive done countlesa times) does this mean i have to be in the game with every mob dying to get credit? Because sometimes ill get a phonecall from work and have to answer and then log right back in after. Any suggestions or answers to this?