The rules seem to be inconsistent when maps can be scored:
In the section on 'map cards', it says:
The map is worth 2 points, should you decide to cash it in at the end of a stage. (my bolding)
Yet the 'End of stage 1' section does not mention map cards at all, and nor does the 'beginning of stage 2' section, implying that they shouldn't be used here.
The 'End of game' section does mention the scoring of map cards.
Obviously, the only effect would be how many map cards are available, so it's relatively minor, but should it only be at the end of a game that map cards can be scored?
BTW, as far as I can tell, the German rule section has the same inconsistency, so it doesn't seem to be a translation mishap.