keynotes numbers and frequency.

Is anybody ever notice that the notes do not correspond to their frequency numbers in the chart.?.I have this strange issue which am not even sure if its an issue. when I press C2 (in midi editor) Cubase tells me am pressing C2 but if I load a tuner in the track it reads as if am pressing C3. I have load different tuners from other developers and they all tell me the same. my Cubase is one octave higher no matter what key I press. I wonder if anyone has ever encounter such or if this is not a problem but normal behavior. This is not related to the fact that english chart places C3 as middle C and Germans seem to place it at C4. either way the DAW is one octave higher. any body knows why ?.