I programmed a song into the XP-80, But when I play it back, whenever part3,(in this case Ressaw Bass) It also activates part one somehow, Im not sure what is wrong, my quick remedy is just not to use the first part, but I would still like to know how to actually fix it. Thanks for any help you can give. btw. I know about layered and single mode in the performance and thats not the problem , thanks.