The picture above pretty much explains it.

(I think the real question here is: How did Peter Jackson manage to make such a *stupid* mistake?!)

Anyway, for those who haven't seen the Hobbit movies, Thranduil actually told Legolas to look for Strider in the wild...
Meanwhile Strider (or should I say Estel) was having fun in Rivendell and doing whatever 10 year old mortals
do.

I'm going to put the same picture here again because it doesn't seem to be loading and I don't know if that affects everyone or just me.