I don't see the contradiction. There is, after all, no one true utilitarianism. What you're not allowed to do is say, as the article did, that X has the highes

I don't see the contradiction. There is, after all, no one true utilitarianism. What you're not allowed to do is say, as the article did, that X has the highest utility when strawmanning a utilitarian, only to turn around and say X sucks once the strawman is over.