Can you use UltraMap to downgrade the firmware from 2.4 to 2.3 to remove the shift function/extra buttons?
If you are running the 2.4 firmware and want to try, please do this:
1. Update firmware to UltraStik2_3.ufw, then remove/reconnect/program the stick
2. Check the Game Controllers Control Panel properties to see if the extra buttons are gone
3. Post your results here
Thanks!!!