EDIT: If none of the above resolves your issue, I just found a link to Audyssey’s forum where other people seem to having the same issue, and it may possibly come down to that particular room correction software not setting the center channel level high enough relative to the other speakers. Hope this helps...
https://audyssey.zendesk.com/entries/20365706-Center-Channel-WAY-Too-Low-
-David
https://audyssey.zendesk.com/entries/20365706-Center-Channel-WAY-Too-Low-
-David