I have a question. When you begin the editing process are your notes and revision-suggestions based on a first read?
I'm thinking that if you have not read the entire book at least once you may make note of, or question something, which happens later on.
Copy edits pretty much jump right off the page but the other stuff, like plot holes filled, questions answered, twists and surprises may be further down the line because that's what the writer is intends, even though as a reader you may feel a little lost as the story builds.
Great post. I love learning how you guys actually do your job.
Typically my revisions are based on the first read. There is one exception and that's if the client is brand new and I just took her on. In that case, I read the manuscript first just to see if I love it and after the client agrees to become a client I read it for revisions.
Your question about what happens if later on I discover the author has done what I wanted is valid and it is definitely something that happens. However, in some cases I might think that it should have happened earlier. For example, if on page 25 I note that the heroine should have kissed the hero right here, but she does so on page 27 I might say, "ah, I see she does it here. That works." or I might say, "this works too, but I really do feel like you might want to consider moving this up a bit."
My feeling when making revisions/edits is that I want the author to see my thought process while I'm reading. If something seems off to me, tedious, over-written or lacking I want her to know. Maybe she cleared it up later or maybe she disagrees, but I think she'd rather hear it from me than reviewers later. Or at least I hope so.
If the writer intends for twists and turns to happen down the road that's fine, but if the reader feels lost as the story builds that's not a good thing. You never want your reader to feel lost because you only, typically, lose a reader once.