Mac mini connected to one HDTV. Two HDMI connections displayed in Audio midi?

I have my 2011 mac mini connected to my Panasonic HDTV via a single HDMI cable. Nothing else is connected to my HDTV. When I go into the audio midi application, it shows two Panasonic HDMI outputs. Up until a few days ago, it correctly listed only one HDMI output.

When I use EyeTV or Plex, I can toggle between the two HDMI outputs and one of them puts out audio. The other does not. How can I delete the HDMI output that doesn't work?

Almost two years after my initial creation of this thread and I'm still having the same problem. All my hardware and connections are the same, only difference is that now I'm running OSX Mavericks.

I still have just one HDMI cable connecting my Mac Mini directly to my Panasonic HDTV. No switches are involved.

It seems when my Mac Mini wakes from sleep it sometimes creates a second, non-functioning, HDMI output Audio Device which can be seen in the Audio Midi Setup application. The creation of this non-functioning HDMI audio device always prevents my Plex and EyeTV applications from passing audio to the Panasonic TV.

Any ideas how I can prevent this from happening? Or to correct it without having to restart the Mac Mini every time?

This has been very frustrating.

EDIT: Moderators, please move this thread to the "Apple TV and Home Theater" forum if that's the better place for this discussion.