Alternates do not show up on the "Device list" on the Command Center tablet, on the cues. They do show up on the "alt1" and "alt 2" buttons on the "Show Controls" screen. But, they should be on the device list. As it is, they show as white when not plugged in and yellow when plugged in. But, They are part of the show (or could be) and, as such, should show red if not found and green when found.