there are misprints on the optional cards. See BGG TS front page:
Optional cards 105, 106 and 108 all have issues in the 2009 Deluxe edition. Depending on when your copy was produced you may have a slip of paper describing the corrections for 105 and 106.
As of late January 2010, all new copies now contain an extra three corrected copies of these cards. The new cards are also available for download from the GMT web site.