(1) No, it's a matter of "in the editor's viewpoint, there was no unique content". "Content" to us means something different than it would to an advertiser -- it's about information, not advertising (Some writing, but not all, can be said to serve both purposes. You may be looking at the advertising component of the other sites -- while the editor skipped over that and found some valuable tidbit of information somewhere. Or we might have made mistakes -- that happens too.)
And "Unique" doesn't mean you wrote it yourself, it means that a surfer couldn't find the same information (perhaps in different words) somewhere else on the internet.
(2) And that's an "all of DMOZ." If the editor had thought it was eligible for another category, he'd have moved it there to be reviewed there. From our perspective, if someone finds us a good site, we're not going to throw his helpful hint away just because he didn't find the right category. This seems obvious to us, but I understand it's not the way Yahoo! works, so it's worth mentioning.
And thanks muchly for your understanding.