If one of the pads is changing patches on your SPD-S, it's because the Control Switch feature has been set to Patch + or -. Here's how to turn it off:
1. Press SETUP so it's lit.
2. Press PAGE right to select "CONTROL SW."
3. Press ENTER.
4. Hit the the pad that's changing the patch.
5. Press the (-) button to select "OFF."
6. If necessary, repeat steps 4 and 5 for any remaining pads.
7. Press PATCH when you're finished. The new setting is saved automatically.
1. Press SETUP so it's lit.
2. Press PAGE right to select "CONTROL SW."
3. Press ENTER.
4. Hit the the pad that's changing the patch.
5. Press the (-) button to select "OFF."
6. If necessary, repeat steps 4 and 5 for any remaining pads.
7. Press PATCH when you're finished. The new setting is saved automatically.