Nope, you explained yourself just fine. Let me see if I understand.
Let's say you have a Project to, oh, fix up part of your garden. As I understand it, you write down a bunch of Next Action steps in a separate list. I'll call that separate list the Garden List. That may contain Actions to prep the soil, wash out containers, buy certain plants, and dig them in.
So you transfer the first item in your Garden List to your Next Action list. But as you work in the garden you discover certain things about the nature of your soil that you didn't know before.
That information may invalidate some of the actions on your Garden List, right? So how do you keep your Garden List up-to-date? Do you review it? If not, when you return to your Garden List to put another Action on your Next Action list, don't you have to re-evaluate the Garden List to make sure it's not out-of-date?