MacBook Keyboard Caps Lock and Num Lock are working in reverse!!!

Ok, this sounds very strange...my keyboard on my MacBook only works when both the num lock and caps lock keys are depressed (so the green lights are illuminated). if the num lock is off then the keyboard does not work. if num lock is on and caps lock is off then the keys only type in ALL CAPS. if both num lock and caps lock are on (green lights) then the keyboard behaves as it should--except it's supposed to be that the num lock and caps lock keys should be off! I've checked system prefs for keyboard and mouse and for universal access, i've reset to defaults, i've restarted the machine...NOTHING works!

Has anyone ever seen this before? Any clue what to do?

thanks
Mark