I disagree with this in part. Staying to the side is fine but you should begin your track when you reach the breakoff altitude not when the group does. If you are 2500 feet low, are you going to wait until 1500 feet to break off? Since most jumpers cannot judge how low they are relative to the formation, use the information you have available (your altitude) and follow the break off plan.
I rephrased my reply. Sport Parachutist's Safety Journal