is your pitch fader at 0% when loading a track and the key has shifted?
if your pitch is set past 3% the key will change when loading a track as the speed and tone are now different to the original key focus of the track and will show as -/+ semitones change
if you put MT (key lock) on then it shouldn't change no matter where the pitchfader (speed only) is.
if this is not what you are on about please could you give us more info.