You may not partition reps for the Dalton workout. Once you start an exercise you must finish it (or your scaled portion of it) before moving to the next exercise.
Also, be careful with those Aussies. If you have little experience with this movement, or if it has been a while since you performed them, consider scaling this exercise a bit. They have been known to produce soreness, swelling and injury if misused.
Derek dropped 7.25 inches off his waist in 2 weeks. Yep, an extraordinary accomplishment.