To note, you should not have to calibrate the synth multiple times. We had changed some of the calibration procedures to tighten voice to voice PW on recent BETA OS versions. Due to the change in the calibration, it was advised that after updating the OS, the calibration data should be cleared and then instrument recalibrated thereafter.
To clear the calibration data from the synth, hold both TRANSPOSE UP and DOWN buttons and press the GLOBAL button. Navigate to the CLEAR CALIBRATION parameter and press the WRITE button.
Power cycle the synth and then perform the oscillator/filter calibration routine. Again, you should only need to calibrate a single time.
I hope this clears things up!