The difference between the entities is largely cosmetic, but it simply isn't accurate to say that "CBS News" is responsible for the content of the article that you linked. As I pointed out, CBS Radio is, so as you say, that points to "CBS corporate" still being responsible, but it's more fair to the people working at CBS News to not mis-attribute the story (I used the abc.com example to try to make it clearer that conflating a source mentioned in the headline with the attribution is a mistake).

edit (which I see you only said CBS, I got lost in the depth of the thread.)