What's going on with the keyboard?

Hi guy's,
since 1 month,shortcut are not working like it was.

My 4 most used shortcut aren't working:
And I don't understand because it still written there:
http://support.apple.com/kb/HT1343

FINDER:

• Open highlighted item normally Command-Down Arrow
  and if I do that, it just jump to the next window.
• Open the folder that contains the current folder normally Command-up Arrow. but same result as previous

Previous or Next browsing page...
wtf !!
Command-Left Bracket ([) Previous browser webpage
Command-Right Bracket (]) Next browser webpage

Go make it with a french keyboard...
And off course it doesn't work.

even with my logitech mouse "previous" and next is selected for the two dedicated button and it's not working...

I'm pissed off..

using moutain lion.

 

hi Mal,
I just deactivated the 2 first shorcuts from the mission control.
^ arrow up or down
but it still the same.

I have a fresh install of moutain lion, I remember that my shortcuts where ok. and after install some app and now shortcuts became crazy.

I mean even when changing the keyboards shortcuts in the system preferences and I saw them changed for my google chrome tab or finder like: go->previous or next.
Next to this the short has changed but don't want to be executed when I press the key..
So I'm lost and desperate. I never click some much....


help

 

up Help!!