In English grammar, to my understanding, it is incorrect to say "this does makes," but I'm not sure why (and nor does my mother, who is an editor).
It is acceptable to say "this makes [sense]," and "this does make [sense]," but why is it not allowable to interchange the two?
What English grammar rule does "this does makes sense" violate? It clearly sounds wrong, but I'm having trouble justifying why.