May be below verses can clarify some of the questions of ongoing discussion.
75.16 Move not your tongue with it, [O Muhammad], to hasten with recitation of the Qur'an.
75.17 Indeed, upon Us is its collection [in your heart] and [to make possible] its recitation.
75.18 So when We have recited it [through Gabriel], then follow its recitation.
75.19 Then upon Us is its clarification [to you].