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The English for the Zeitmarke is 'current-time indicator' or just 'CTI'.
Are you referring to the fact that the CTI is not at the very end of the layer? The CTI rests at the beginning of a frame. The Timeline panel also shows the rest of the frame, which extends past the CTI a little. This is normal.
The pale grey column that extends all the way down is just showing you the duration of the frame that the CTI is sitting on, from the beginning of the frame to the end.This pale grey column is only obvious when you zoom in in the Timeline panel.
The simple and correct answer (in extension to Todd's explanation) is, that the CTI displays the shutter duration, if you enable the Motion Blur Preview button in the timeline. If the moblur is turned of, it will show only the current frame, being parked at the temporal entrance point of that given frame.
(deutsche Übersetzung auf Wunsch)