MacBook Pro :: Can't Navigate Normally With Finder

I can't navigate as i usually did. For example i open a new finder window pressind Cmd+n, and it goes to the folder i set it up to, then i try to navigate to the folders within with the arrowkeys, but i doesn't want to go rigth, then i press the down or up arrow keys and it jumps inside the selected folder, but something rare happens it creates a folder called "nombre" (i have my mac in spanish) in the top of the finder list of subfolders, when i go down in the list i've noticed the other folder items also changed their names to "nombre" and that inside each of these folders there's another with the same name, i've also noticed i can't click on the "nombre" folder to select it i can only select it whit the up or Down arrow keys, and i can't delete it beacuse of (error -8058)

Info:MacBookPro, Mac OS X (10.7.4), Finder Issues