When in doubt, check the card numbers. The scenario reference card is #120, agenda + act cards are #121 to #123, followed by a location #124.
It usually helps to assume nothing, so number of act/agenda cards from other scenario(s) don't matter at all.
Card numbers have been helpful as well.
One time in LoTR my encounter cards got all mixed. I had no clue how I was going to resort them. Aha! The card numbers! A pain staking process but necessary.