Multiple players considered last on Charity board in Medieval Academy
As you say, the rules (quoted below) cleary state that in case of a tie on the "0" spot of the track, all tied players are supposed to get the whole penalty. I would use substitute (unused coat of arms for a value of -10 for instance) to track that...    


  If your disc has never moved on a track, you are automatically
  considered last on that track. As such, you can not get
  anything positive from that game board (no positive Chivalry
  Points, no bonus from the Gallantry game board), or if it is
  a game board that gives negative points, you and every other
  player on square 0 of that track will be considered last and
  will get the corresponding coat of arms. If 2 or more player
  get last place this way, no negative points will be given to the
  players ranked second to last.