I have never claimed to be all that smart, so maybe I don't understand something. But I am wondering what this squabble over what this license says or what that license says is all about. My understanding of copywrite law is that the author of a work owns the copywrite. Therefore, that owner can decide if he wants to license that work or not, and gets to decide under what conditions he wants to license that work. The next guy that comes along can't just change that license because he wants to. Only the owner of the work can change the license of that work. The fact that the particular work in question has two licenses does not matter in the least. The owner of the work decided to put those two licenses there and the only person who can change that (legally) is the owner of the work.
This seems so simple. Why is this so hard to understand? I have a car, I put the license plate on that car, I let my friend drive the car all he wants. It doesn't mean he can take my plate off the car and put his on it and claim that he owns the car. That would be stealing the car. I guess it's not a perfect example, but it's not too far off. s