Hi,

most likely the physical train didn't change its formation at all, rather then the repensentation in the information systems were wrong. Someone from the train crew noticed and rectified the data. Maybe they did it a tad late or clicked the wrong station? Hard to say.

I can't say for sure though, I wasn't there to witness.

--
"Diese Preise sorgen dafür, daß die Bahn an anderer Stelle immer mehr rationalisieren und einsparen wird. Nicht oben in den Höhenluftbüros, nein, unten an der Basis auf dem Bahnsteig oder im Zug. Am Fahrkartenschalter. Bei den Ansagen." ~ Alibizugpaar