First off let me dispel the myth that many have that angels are a separate species than mankind. Angels are messengers. All angels are mankind. True Satan was an angel but he was also a man. An angel is merely a title for a messenger.
Isaiah 14:12-17
12 How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations!
13 For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north:
14 I will ascend above the heights of the clouds; I will be like the most High.
15 Yet thou shalt be brought down to hell, to the sides of the pit.
16 They that see thee shall narrowly look upon thee, and consider thee, saying, Is this
the man that made the earth to tremble, that did shake kingdoms;
17 That made the world as a wilderness, and destroyed the cities thereof; that opened not the house of his prisoners?
Also consider Genesis chapter 19
Genesis 19:1,5,8,10
1 And there came
two angels to Sodom at even; and Lot sat in the gate of Sodom: and Lot seeing them rose up to meet them; and he bowed himself with his face toward the ground;
5 And they called unto Lot, and said unto him, Where are
the men which came in to thee this night? bring them out unto us, that we may
know them.
8 Behold now, I have two daughters which have not known man; let me, I pray you, bring them out unto you, and do ye to them as is good in your eyes: only unto
these men do nothing; for therefore came they under the shadow of my roof.
10 But
the men put forth their hand, and pulled Lot into the house to them, and shut to the door.
Where do you come up with the notion that God after casting Satan out of heaven that he appointed him to be over the Garden of Eden? I see no evidence of this and it sounds preposterous. Adam was appointed to take care of the Garden of Eden.
Genesis 2:15
15 And the Lord God took the man, and put him into the garden of Eden to dress it and to keep it.
Is it your opinion that Adam and Satan are the same being? If so, that too is absurd. It is clear that Satan's rebellion was in heaven and that was the reason he was cast out into the earth.
Revelation 12:7-11
7 And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels,
8 And prevailed not;
neither was their place found any more in heaven.
9 And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.
10 And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for
the accuser of our brethren is cast down, which accused them before our God day and night.
11 And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death.
Isaiah 14:12
12
How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations!
Verse 9 of Revelation 12 tells us that Satan was cast out into the earth. It was in the earth that the Garden of Eden was. This was after Satan's rebellion in heaven and after he was cast out. Satan did not become a messenger of God after being cast out of heaven and was not appointed over the Garden of Eden.
To the Prophet Joseph Smith, it was revealed to him by Jesus Christ himself that Adam is Michael and also the Ancient of Days (see
Doctrine and Covenants 27). Not sure how you come to the conclusion that Michael is Jesus and the Ancient of Days is our Father in Heaven. What is your evidence? Adam first returns to the earth and is crowned and then one like the Son of Man, who is Jesus comes and receives his throne over the house of Israel. Daniel 7 is a prophesy of things that will occur on the earth. When Zion is again established the Ancient of Days (Adam) will come and sit upon his throne and then he will receive Christ when he comes and Christ will be crowned to be King over the house of David, and over all Israel, and the whole world.
