A quick update: Edward in customer service has been assisting me with this problem. He's been very responsive and after a little further troubleshooting, he is providing me with a label to ship the unit back.

While Outlaw's records reflect the center channel was operational when it was sent to me, something has definitely changed because it is dead now.

I just want to get the unit back fully operational. Watching Ratatouille with my 5 year old in just stereo just doesn't cut it.