Mr. Webmaster!
Mr. Webmaster, somehow I think that you don't want to believe that there is one ALLAH. Specially you won't like to listen this from a MUSLIM. Therefore I suggest that you to find a CHRISTIAN Scholar whom you think is learned and able to understand your question and tell you that HIS MAJESTY can use the word "WE" for himself. Especially in Arabs the Chiefs and Kings and the Presidents usually use "WE" for themselves. It's quite natural over here in Islamic world.
If you really want to know that why ALLAH uses "WE" for Himself being SINGULAR, than find a man you believe and discuss the matter with. Please do keep us Posted!
One more thing, try to learn the English Language Structure, Because I think that the bestsellers have taken away a lot from you .