MusicProd overlay sensitivity issue

I’m using the Music Production overlay. The drum pads trigger drums, and I’ve reprogrammed the upper row of buttons to be momentary buttons. But the top row of pads responds to button presses unless their threshold is set to at least 3. Button 4 (4th from left) consistently triggers the drum pad below it unless the pad’s threshold is set to 6, and button 2 is even worse: even with a threshold setting of 10 the pad below it is consistently triggered.

Is there a way to better isolate the top buttons from the pads below them?