(as an aside, I've already suggested in the template that publisher only be listed where the editor is freelance or the title is not by their primary publisher. for the moment anyway, that keeps listings cleaner and makes it easier for people to add information quickly.)
Which order should works be listed in on SF Editors (by year)
Most recent at the top, like a resume
Chronologically down: most recent at the bottom
How should listings of books edited be formated?
author, title -- publisher
title, by author (publisher)
author - title
some other way (please leave a comment)
How should collections or anthologies be identified?
"edited by ____" is sufficient
label them as "an anthology" or somesuch somewhere
don't worry about it.