Seemed to me like a wrong grid, reported on grid formation, grid was fixed up front, but not all the way back, I think it was a wrong grid. 68 started right but then was on grid again on right so there had to be a mistake in front. Probably due to a car falling out and they took the place of the car that crashed on formation lap. Changing the sides for the rest behind.
And some people should learn to drive straight and not change lines way too much. Pick a line and stick to it.