I agree with that, but I do think there needs to be some amount of effort that justifies putting out a new "edition" of the book, so to speak (which it sounds like you're doing). What Amazon is having problems with is large-scale automated stuff that doesn't bother to do good formatting at all, like the folks who are just repackaging Wikipedia articles, or PDFs directly from Google Books. I'm guessing Amazon just doesn't want to put in the resources to distinguish those cases.