Mutegroups and Same Note Retrigger

Hi Ken,
...deleted this first part of my answer as I jumped to the wrong conclusion...

Suggestion for bypass: if you need %%retrigger=Y for the complete set, but with some individual samples part of a mutegroup: just add %retrigger=N explicitely on these individual lines.

Additional questions as I'm puzzled by the mode=once+triggernotes=yes in combination with a mutegroup:

• is this definition part of a percussion/drum set containing a hihat?
  
• why do you want self mute and retrigger - this contradicts as it says "mute and play" which I interpret as "I want no sound but I want it"
  
• this in combination with mode=once, which says "keep playing after note-off"
  

To clarify:

• A mutegroup means that a new note (or chord) stops the previous one and plays the new one (or chord). If you play the same note, it will mute itself withou starting a new one.
  
• Retrigger means that when the same note is played again, the previous (same) one is allowed to finish (either via release or via playing to end via mode=once).
  
• Mode=once means that the complete sample will be played and when you play it again before it's finished, the new one takes over by ending the previous and play the new one (with mode=onc2 it will stop at that second press).
  

Combination of this is what's going on here, which I think is exactly what your parameters say. As they are ambigious indeed, we have a puzzling issue here. The mode=once is honoured.
If you want suggestions for the definition.txt I need some more info on what musical effect you want to achieve.
Same goes for bug-fixing if that's at stake now; I can't tell now as I don't understand yet what you want.