I doubt there is anything you think you know that I don't. Moreover most of what is reported from Mormon Theoldy or doctrine is most often individual belief and speculation. Even from Joseh Smith and Brigham Young.
Nothing you quoted is Church doctrine or Canon. Those are beliefs held within and among members of teh Church, which beliefs difer as much as my Fathers Southern Baptist congregation beliefs' differed among each other.
As a missionary for The Church of Jesus Christ of Latter Day Saints, "Mormons" I ONLY taught that we are Saved through Grace alone. Only through the Grace of God are we saved. THAT is Mormon theology. Just as the Bible teaches us however, Faith without works is dead. Please learn from the source,not someone who "thinks" they know.