How is the Oops Detection schedule handled?

Oops Detection projects are added to the schedule on a first-come, first-served basis. However, if you've prebooked Oops Detection, you basically get to cut in line—it's like making a reservation at a restaurant as opposed to just showing up. Let's say I have four books waiting for Oops Detection–A, B, C and D. We're currently working on Book A. You let me know a couple of months ago, though, that you'd have a book ready for me now. That means that as soon as I finish Book A, I'll start on your project. If you hadn't made a reservation, you'd come after Book D. That would suck. Schedule in advance if possible. 🙂