Hi Colin,
Have you perhaps performed a System Reset (by holding down the right-most white piano key when switching on)? This would automatically turn off the Registration Sequence function.
You can quickly call up the Registration Sequence display with [Direct Access] > [Memory] (and switch it back to "ON").
Regarding pedal polarity: Please make sure not to press/move a pedal during the boot process, as this can lead to the polarity being reversed. If necessary, you can set the pedal polarity manually: [Direct Access] > press the pedal > touch the "Menu" icon
Hope this helps!
Best regards,
Chris