I just want to clarify the hero's turn.
The heros can take their turn in whatever order they want, but they have to do their actions in the order on the card.
move
exchange
ranged attack
fight zombies
correct?
The HERO TURN is the part of the game where all four heroes take their "GO" (my term). The heroes may go in any order (and in different orders each TURN, if it benefits them. During each hero's "GO", they have to take their "ACTIONS" (Move, Exchange, Ranged, Fight) in that order, as printed on the card.
Note that some cards, such as zombie "at the beginning of the hero turn" and, especially, Nurse Becky's "At the end of THE hero turn" are greatly affected by this.
Don't fret. This is a very commonly overlooked, missed (and, imho, poorly worded) rules issue. I was already a veteran player for months before I made this realization.