According to
info.flightmapper.net, the aircraft should be a 763ER without AVOD for ATL-ZRH. It appears that it is almost certainly a glitch on delta.dumb.
On another note about the ATL-ZRH route, the route is slated to go permanently to a reconfigured 763ER (the 76W to be exact) beginning Jan 31, 2014.
Additionally Tuesday and Sunday outbounds and Wednesday and Monday inbounds are scheduled to be operated on 76Ws until Oct. 22 (ex-ATL, 23 ex-ZRH).