The term "Heroku" doesn't even appear in the post at all, so I think this is definitely one example where it does make sense to match the HN title to the blog article title.
I think the point is that Cloud66 allows you to deploy to 1 server and scale from a web gui, which is essentially what a "dyno" abstractly is.
I don't like the terminology used, either, and seeing as it isn't on the actual article, I'm expecting a HN mod to change it in 3...2...1...