You are right. Publisher and "The company behind" do not necessarily equal "maker of". Perhaps I should have instead posted the Reuters article titled "Electronic Arts to buy Chillingo for $20 mln".
The "maker" or "developer" is Rovio, which created the app. Chillingo published the app on the app store and was responsible for marketing. Rovio still owns the IP to angry birds (The angry birds franchise is likely worth more than 20 million on its own). The value of Chillingo likely comes from the fact that it published 2 #1 hits (Angry Birds and now Cut the Rope), meaning it has a brand name with iOS gamers.
http://www.reuters.com/article/idCNN2022096920101020?rpc=44