I saw that too. The message on the red banner reads: "This is the 'dark-silo' Voice Tools environment (PRODB) used for internal beta testing purposes only." It kind of looks like Cox was doing some testing and the test environment made it into the customer, production environment. Either that or they meant to move it to production and forgot to remove the test environment banner. Oops!
I deleted a voice-mail and the time in "Voice Tools" changed for that call from being about the same as the time in the call history stored locally on the DVR to being an hour earlier.