Yes i was referring to controllers in my reply as you stated yours were just that. Usually a setup like that with a ton of buttons is a keyboard encoder not a controller encoder, so is configured in the keyboard mappings section, not controller mappings.
EDIT:
Also yours is two controllers, so they do in fact have 16 buttons each, just like i said, really the encoder should be setup as two 16 button controllers, not one with 32 buttons.