when you say you are playing a “two octave chord” with each hand (which is what you claimed to do on a 37-key keyboard) that means you are playing octaves with both your left and right hand, for four octaves… unless you are stretching to play MORE than an octave with each hand.
lol, it has nothing to do with music theory… the only note of which there are four on the Digitone Keys is C.
you have yet to address why you are bent out of shape by where the programming controls are on the product while you play with “two hands” given that you can’t play with two hands and program at the same time… unless you have three hands… do you?