That is a very confusing photo, but as noted, don't know timing. It's weird to see a car upright on the 2nd track, others on the other track, so one might guess that it was picked up.
There is a very large gap between the three cars that broke from the rest of the train and rolled on to its side and the seven cars that made it past the switch. I'm not sure what force could have stopped the three cars so far away from the others. (That's why we have professionals at the NTSB and the FRA on site.) Note that eight of the 10 cars derailed, so the third car shown connected to the engine was also derailed (along with the fourth which was rerailed on the siding, the fifth and sixth that are shown somewhat upright and the seventh car which is on its side near the switch).
The large gap between the seventh car and the still connected last three cars was shown in pictures posted immediately after the incident. Something happened to break these three cars off of the train and bring them to a stop before the rest of the train came to a stop ahead. I am looking forward to the NTSB/FRA making the determination of what caused that break.