On this screen (the Results one after the race) GT4 always displays the finish times of the cars as they cross the line, without reference to lap numbers. This is why in my A-Spec Endurance companion I always had to note when I lapped cars myself.
In this case the 2nd place car's finish time is 0.2s behind the 1st place car's finish time, and 5th place's finish time is a further 0.1s back. But because they were lapped this is the finish time as they cross the line on their final valid lap, and they have however many laps they were down that they cannot complete. 3rd, 4th and 6th did not cross the line between the 1st place car finishing and the user exiting the race.
The display is inadequate in the amount of information it gives though.