Matt Finley: thank you for your answer. I knew about the relative minors/majors, and I had noticed/guessed that, but that still doesn't solve the problem to me: if I write 2 in C minor key i expect to see there a Ddim as in
https://www.piano-keyboard-guide.com/c-minor-scale.html
"Chord ii: D diminished. Its notes are D – F – Ab."
if I get a D, those are different notes/chords/sounds differently and in that sense I see it as not working even if i do get a D instead of an F which i would get in the other setting with the relative minor/major.

Band in a Box plays something different if I insert a D instead of a Ddim or a Ddim instead of a D, and depending on they progression/key this could sound bad and mess up a song.

Am I missing something?
Thank you for your help!