How come this isn’t a belief that you often hear about with Mormon missionaries?

Do you have to be Mormon to finally find out these beliefs?
No, come on seriously?
I don’t know much about the Mormon faith and their doctrines (don’t really care to) but it seems to me that Mormonism is different depending on the particular Mormon.
God bless
Well I was hoping some powerful Mormon defender would jump in here and try to deny the charges but it appears they are not going to stick their neck out on this one so here goes.
LDS Doctrine and Covenants (Mormon official scripture)promises the faithful LDS couple that they can achieve godhood in the same manner as God the Father:
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"...if a man marry a wife, and make a covenant with her for time and for all eternity,... they shall [have]...a continuation of the seeds [children] forever and ever. Then shall they be gods, because they have no end; therefore shall they be from everlasting to everlasting,... Then shall they be gods, because they have all power,... and continuation of the lives,... [endless procreation of spirit children]" (Doctrine and Covenants Section 132:18-22)
Now before some complain about the additions in the brackets let’s let some Mormon top leaders explain them.
LDS Prophet Joseph Smith taught that God was once a mortal man:
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"God himself was once as we are now, and is an exalted man, and sits enthroned in yonder heavens! That is the great secret. ...I am going to tell you how God came to be God. We have imagined and supposed that God was God from all eternity. I will refute that idea, and take away the veil,...
He was once a man like us; yea, that God himself, the Father of us all, dwelt on an earth, ...you have got to learn how to be gods yourselves, the same as all gods have done before you,.. and be able to dwell in everlasting burnings" (History of the Church, Vol. 6, Ch. 14, p. 305-6).
Mormon Apostle Orson Pratt said:
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"If we should take a million of worlds like this and number their particles, we should find that there are more Gods than there are particles of matter in those worlds." (Journal of Discourses, vol. 2, page 345)
Gods wife (wives) Apostle Bruce R. McConkie explained the doctrine:
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"Implicit in the Christian verity that all men are the spirit children of an Eternal Father is the usually unspoken truth that they are also the offspring of an Eternal Mother. An exalted and glorified Man of Holiness (Moses 6:57) could not be a Father unless a Woman of like glory, perfection, and holiness was associated with him as a Mother....
"This doctrine that there is a Mother in Heaven was affirmed in plainness by the First Presidency of the Church... they said that 'man, as a spirit, was begotten and born of heavenly parents, and reared to maturity in the eternal mansions of the Father,' that man is the 'offspring of celestial parentage,' and that 'all men and women are in the similitude of the universal Father and Mother, and are literally the sons and daughters of Deity.' " (Mormon Doctrine, 1979, page 516)
As recently as 2007 both Apostle Boyd K. Packer and Dallen Oakes, during an interview for PBS, explained that God the father has a resurrected body. Apostle Packer stated:
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"That vision [Joseph Smith's 1820 vision] taught us some things. We learned about the personality of God the Father, a RESURRECTED BEING, as part of our gospel."
Polygamy in heaven? While church leaders no longer allow the practice of polygamy here on Earth, they do allow a living man to be sealed to another woman after the death of his wife, or after divorce. This leads to the obvious situation of establishing multiple sealings on Earth that, according to Mormonism, will necessitate polygamy in heaven.
This doctrine was reaffirmed in October of 2007 at the funeral for the second wife of President Howard W. Hunter, the fourteenth President of the LDS Church. The Deseret News reported:
President Hinckley affirmed the eternal nature of the marriage between Sister [Inis] Hunter and the former church president, whose first wife, Claire Jeffs, died after a long battle with Alzheimer’s disease and is now buried beside him in the Salt Lake Cemetery.
Inis Hunter “will now be laid to rest on the other side,” he said. “They were sealed under the authority of the Holy Melchizedek Priesthood for time and for all eternity,” he said, recalling the marriage ceremony he performed for them in the Salt Lake Temple in April 1990. (“Sister Hunter’s humor and cheerfulness remembered as she is laid to rest,” Deseret News, Oct. 22, 2007).
Another example of plural sealings is Apostle Russell M. Nelson 's marriage in 2006 to a BYU professor. The BYU NewsNet for April 7, 2006 announced the temple marriage of Apostle Nelson, age 81, to Wendy Watson (see [link]). His first wife died in February of 2005 and this was the first marriage for his new wife. This would mean, according to LDS beliefs, that Nelson has two wives sealed to him for eternity.
Joseph Fielding Smith, tenth president of the LDS Church, remarried twice after the death of his first wife, and in his book, Doctrines of Salvation, Vol. 2, p. 67, he remarked: “…my wives will be mine in eternity.”
Harold B. Lee, the eleventh president of the church, also remarried after his wife 's death and was sealed to another woman and was looking forward to a polygamous relationship in heaven. He, in fact, wrote a poem in which he reflected that his second wife, Joan, would join his first wife, Fern, as his eternal wives:
My lovely Joan was sent to me: So Joan joins Fern
That three might be, more fitted for eternity.
“O Heavenly Father, my thanks to thee”
(Deseret News 1974 Church Almanac, p. 17)
Tiber diving team of 2004 (we go deeper to penetrate the darkness with the light)