I am trying to print a 2-part staff with a triplet. Why can I create notes as same-note chords, but when they are triplitized, the notes become separate?
That'll be one for Eric to answer I reckon.
Because they are no longer the same. For note off purposes, NWC treats the 'Dur2:' portion as non-tripletized quarters. A bit "too literal" an implementation of the concept, I think.