Hi Sébastien, I introduced `org-clock-file-time-cell-format' which does the same thing than `org-clock-total-time-cell-format' for the file time.
The original display of the clock table with the default values for both options is consistent. Putting the "File time" in a different column would require putting the "Total time" in yet another column, which IMO makes the clock table to large. Best, -- Bastien