That is extremely fair, thank you so much.
I tried linking several different Insteon devices to the EZIO and none responded to open/close changes in the EZIO sensor inputs. I confirmed the new links were in fact added to both the EZIO and linked devices. Device mismatches are still present, and always on the last record.
I was hoping querying the EZIO after would “kick” the linked Insteon devices on or off in response to open/close changes, but all that happened was the ISY status changed – the linked devices stayed in their current state.
I also grounded the I3 and I4 analog inputs to GND and still no change.
Anything else I can try?