We need a Genos expert to weigh in. In a perfect world, the Genos would only transmit on channel 1 for the whole keyboard, and the SD90 would deal with splitting the keyboard for you based on where you set it using the "Split" button on the SD90. It sounds like you have the keyboard split on the Genos and it is sending out on both channel 1 (right hand) and 2 (left hand). We can make that work on the SD90 by turning off Global and setting Left to 2 and Right to 1. Let's see if some Yamaha folks can comment on what settings would force the Genos to send on only channel 1 across the whole keyboard. You can try the settings I mentioned above and see if that works for you. Let us know how that goes. Once we get the basic config working, we can move on to the next steps.