I'm not 100% sure, but from what you say I think you plugged your wire to a digital output on the arduino instead of analog output.
I never use nunchuk with arduino&processing, but I already used it in an AS3 project and I remember the values that came from nunchuck were floats (very accurate floats actually) then I don't think it's normal that you get int value, but it could be normal if you use digital output instead of analog.
Answers
hello !
I'm not 100% sure, but from what you say I think you plugged your wire to a digital output on the arduino instead of analog output.
I never use nunchuk with arduino&processing, but I already used it in an AS3 project and I remember the values that came from nunchuck were floats (very accurate floats actually) then I don't think it's normal that you get int value, but it could be normal if you use digital output instead of analog.
Let me know if it work !
I think it come from here, on the arduino documentation I can read that analog pins have the numbers 3, 5, 6, 9, 10, 11
Then your 3 values
are incorrect