Contradiction in LDS Teachings

Moroni 7:14; “Wherefore, take heed, my beloved brethren, that ye do not judge that which is evil to be of God, or that which is good and of God to be of the devil.”

Moses 5:11; “And Eve, his wife, heard all these things and was glad, saying: Were it not for our transgression we never should have had seed, and never should have known good and evil, and the joy of our redemption, and the eternal life which God giveth unto all the obedient.”

2 Nephi 2:23; “And they would have had no children; wherefore they would have remained in a state of innocence, having no joy, for they knew no misery; doing no good, for they knew no sin.”

2 Corinthians 11:13-14; “For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ. 14 And no marvel; for Satan himself is transformed into an angel of light.”

Wow.  I’ve got to say the evil one sure is tricky now isn’t he?  Why would this be in their scripture when it totally contradicts what they’ve taught earlier in the BoM about Adam and Eve needing to be tricked with evil by God?