Yes, professional has two meanings in use here. Professional as in relating to one's profession, and professional as in how one may be expected to behave when carrying out one's profession.

In my comment I was using the former.

I'm not really sure what you're on about me "misinterpreting" something. The author of the article claimed to not have personal criticisms, and I was pointing out that there's a standard interpretation of those words that is true.