Now working both fronts at the same time, cast on 3 sts at beginning of armhole edge for sleeves (every other row) twice. .
[color=darkblue]I'm a visual learner, so I'm not usually good discribing things, but I'll give it a shot.
It sounds like the fronts for the sweater are at either end of your work and the center front edges are the outside edges. Which would make the armhole edges on either side of the 54 sts for the back.
And it sounds like you will have cast on 3 sts twice on each front at the armhole.
If I didn't express that well, tell me what it says to do after that. Does it tell you how many sts you are suppose to have on each front?
I always like patterns that gave that info when I was learning to read patterns.
Also, what style sleeves does the sweater have?[/color]