[solved]So how do I setup a left-handed mouse

[MeaCulpa]

3.4e liveCD/DVD boot:

After I boot the liveDVD I get in KDE then I tried to setup my mouse in control center for a left handed one.
But after I set it the mouse act strange-both left and right click act the same as a left-click+right-click, context menus, helps, etc...
Searched the forum, found someone has the same problem but no satisfying answer so far so I ditch it again here.
updated:
Then anyone have experience on setting up a left handed mouse?

[updated]
Solved, removed the duplicated mouse device entry created by default in xorg.conf. And all fine.