LotR Movie Mistakes?

[Maeglin]

That car-thing just cant be true! <P>But did u notice that Bill (the moule or however that spells). Doesnt exist in many scenes. Like when they wander in the mountains and u sees it from very high above, where you realy should be enable too see him he is'nt there (unless they forgot him some miles behind and went back for him without it was taken up in the story line).