I may be off base here, but did you check to see if the patches were changed with the sd2 turned off? (using a soft synth instead?) Did you try setting the patches from the drop down menu using the green SEQ button? I used to get upset when the patches would change, but then remembered that some patches were changed by the Style when I hit play again. This was before they had the Freeze button. I have an sd2 also. I've never had any issues with the sd2 itself. There are others on here who are way more knowing about this stuff than me though. HTH

Stan

Cornet Curmudgeon