Have you not seen that I already copied that conclusion in my post? Why did you post it again? Most likely because you did not bother to read my post.Well this article is arguing in my favour, so I'm not sure why you posted it. Did you actually read it? Hear is the conclusion.
I posted the link to the article as an example of where you are coming from. Not because I agree with it. And why shouldn’t I post that link? We are not afraid of your arguments. Only: you are asking the wrong question! The question is not whether the Formula of Concord agrees with Martin Luther but whether it agrees with Holy Scriptures. We cannot be certain about Luther’s opinion but - and you have been told this several times by now - Lutheran theology is NOT the theology of Martin Luther but of the confessional writings of the Book of Concord. They are the norm of Lutheran theology not Luther’s books. Not even the bondage of the will.
So your point that the Lutheran confessions do not agree with Luther are moot. Luther wrote a lot and he also changed his mind. It is impossible that everything in Luther would agree with Lutheran theology. Only those works of Luther which are part of the book of Concord must agree with the other books in the book of Concord written by Melanchthon, Chemnitz and Andreä. And they do, these works do agree with each other. Now your job is to show us that they do not agree with Scriptures!! Have fun trying. My guess is that, should you really try, you will end up a Confessional Lutheran.