[Em]

I think i may be able to explain the eye problem: in the book 'the magical worlds of tlotr' there is a chapter called 'why might sauron appear as a single eye' so follows some extracts from that chapter:
'Although there are few references in tlotr to Sauron having a body (less the finger that was cut off), he generally appears in the form of one all-seeing eye. Frodo sees the eye in the mirror of Galdriel, and it scares him so much he can't move or speak. He sees it again when he puts on the ring to escape from Borormir, sensing that it is looking at him.Orcs at the dark tower use a red eye as their mark, and to refer to Sauron as the great eye. Bilbo compalins that the Ring, which contains Saurons spirit, "was like an eye lokking at me".
Legends are fullof one eyed Gods and demons. Often these one-eyed Gods are able to see all.You can't keep a secret from them, in the same way you can't avoid the suns glare. One of the gods played an important role in shaping Saurons character.Odin. He was the early source of a necromancer in the hobbit, who eventually grew into the Dark Lord of lotr.'
So you see, i think that Tolkien based Sauron on Odin. The one-eyed God, who sees all.