It's hard to understand how this got past blind testing, but the rules in the second edition are very confusingly written (emphasis mine):
If you draw a "1 draw" card for an Area, draw and place one extra card into the current Area before moving on to the next Area. If the extra card you draw is a second "1 draw,” place the card in the current area. Ignore the "1 draw" instruction and move on to the next Area for the next Fish card.
The rules clearly make it sound like you are supposed to place an extra card into the same slot as the card you just drew. But by "current area", they must (unintuitively) mean not the area you just placed a card into, but the next area which immediately technically became "current" after placing the previous card.
Instead, I suggest the rules should read the following way:
If you draw a "1 draw" card for an Area, draw and place a card from the same deck into the next Area also. If the second card you draw in this manner is a "1 draw” card, ignore the "1 draw" instruction and move to the next deck.