It would be interesting to find where (date-wise) Smith concocted the Kolob mythos, if it was shortly after or months after he began working with his Hebrew teacher. He started making the changes and additions to the KJV when he had started his Hebrew lessons ... some lessons, that allowed him to add hundreds of words to Genesis chapter 50, for example. It would be an interesting study don’tchaknow.
Joseph Smith is provably a liar. Toward the end of Smith's life people began to learn of his polygamy, which he kept hidden. William Law was Joseph Smith's second counselor in the church's First Presidency. He filed suit against Joseph Smith for living ``in an open state of adultery'' with 19-year-old Maria Lawrence.
In a sermon (!) Joseph Smith falsely denied he was a polygamist (it is now known to a certainty that he was a polygamist at this time):
What a thing it is for a man to be accused of committing adultery, and having seven wives, when I can only find one.
I am the same man, and as innocent as I was fourteen years ago; and I can prove them all perjurers. I labored with these apostates myself until I was out of all manner of patience; and then I sent my brother Hyrum, whom they virtually kicked out of doors.
Here is a link to the actual sermon where he falsely denied polygamy in response to the accusations:
http://www.utlm.org/onlineresources/sermons_talks_interviews/smithboastingandpolygamydenial.htm
Here is another gem from that sermon, where he sets himself above Christ:
Come on! ye prosecutors! ye false swearers! All hell, boil over! Ye burning mountains, roll down your lava! for I will come out on the top at last. I have more to boast of than ever any man had. I am the only man that has ever been able to keep a whole church together since the days of Adam. A large majority of the whole have stood by me. Neither Paul, John, Peter, nor Jesus ever did it. I boast that no man ever did such a work as I. The followers of Jesus ran away from Him; but the Latter-day Saints never ran away from me yet. You know my daily walk and conversation. I am in the bosom of a virtuous and good people. How I do love to hear the wolves howl! When they can get rid of me, the devil will also go.
--------------------------------------------
But of course, for people that think that faith doesn't have to correspond with reality, and all religions are the same, just because Joseph Smith showed himself to be a liar it shouldn't be considered evidence against the faith of Mormons. Reality has nothing to do with faith. Prophets don't have to be truthful.
If someone can prove to me Christ was a liar in the same way as this prophet that set himself above Christ, I'll listen.