The 1st level disciplines have 2 copies each, but all the rest are single. Are they limited by the cards, or can multiple characters have a copy of those as well?
From page 66 of the rulebook (the 2nd sentence is the relevant one):
If you are instructed to Spawn a figure or token and all of copies of these components are already in play, do not Spawn anything. Items and Disciplines are also limited by the components included in the game box.