Drums and Lights layout are opposited. For an example:1.1: Reverse Button Grid ( On ): when I press the Bottom Left Button, It showed note C1 on Drum Rack but Light feedback at Top Right conner1.2 Reverse Button Grid ( Off ): Tested on the same Bottom Left button ( Note C1 ). Leds are on the right direction but the Drum rack show on opposite side ( Top Right Button )
Video below show the problem: