Duplicate Flight Plans posting - kills tracking in progress


I’ve been noticing a problem tracking my airplane (N8KF) over the past few weeks.

Today is another example.

A flight plan was filed, over the telephone, from Orlando to Sioux City.

90 minutes into the flight a new proposed flight plan shows on Flight Aware and the tracking icon for the airplane, currently over Georgia, disappears.

On FlightAware I see the message that the Flight Arrived 22 minutes ago.

The map does not show the airplane but the line continues to move. If you click on the Track Log information continues to update even though the screen shows the flight has arrived.

Anybody have any idea what is happening?