Okay then - next question.
Is eating not enough calories on your UDs causing you to binge? Has that actually happened or is it a hypothetical question? It's actually a great thing to think about - it's common for people to eat less on UDs than they could because they think that's better than eating all their allotted calories. And it's common for those folks to struggle with DDs more than they should precisely because they didn't take in enough calories on an UD. So it ends up being a counterproductive thing to do - you're more at risk of blowing the subsequent DD.
Dr J contradicts himself a bit in the book by saying at one point that there's no limit on UD calories - you should eat until you're satisfied - but then at another point says you should limit your intake to your allowance and take care not to eat unhealthy foods. The problem is that Dr J is a plastic surgeon, not a diet doctor, and I suspect he doesn't really understand that some of us are never satisfied with our food intake.
If what you're currently doing is working for you, stick with it.