Look at your box cover. Is the red monk male or female? If it's male, then you have the 1st edition, and the extra set of cards are most likely the 2nd edition cards that you could get to replace the first edition to be compatible with the expansion. The one difference I know if is the "no dice" symbol. (sorry, can't recall what it's actually called.) On the first edition cards the symbol is a die with an red x through it, for second edition it's a shield symbol with a checkerboard pattern.
If the box top is female, then I have no idea... heh
Edit: also just thought of this, have you contacted the person you traded with and asked them?
Last edited Wed Jan 9, 2013 10:49 am (Total Number of Edits: 1)