Help With Crochet Afghan Instructions?

I played with the directions to see what it looks like both ways. I would conclude the directions mean to do all twice; otherwise, there is only one long petal while all others remain same size and it looks odd. But if you are making squares to join together, then the one longer chain loop is probably to join the other squares with. If it isn't a square to join with others, then I would create all as a repeat inside the [brackets/parenthesis) two times which gives a floral pattern and a fuller one.

This is the best I can do for you w/o seeing the pattern/directions. Hope it helps you.