not yet departed, but has already arrived.

FlightAware General
1

flightaware.com/live/flight/N757 … /KDAL/KDTW

Filed for 12:10 departure but shows arrival at 9:30, flight has not yet flown.

2

N757SS is a time machine.

3

and a well-appointed one at that:
http://img253.imageshack.us/img253/7140/44470440wz4.png
http://img411.imageshack.us/img411/4548/80342226uc3.png

4

New link shows the same issue.
flightaware.com/live/flight/N757 … /KDAL/KDTW

5

Looks fine to me.