The "rhyme and reason" to booklists is that you can change it to be whatever you want it to be by using the "sort" feature: around the middle of the screen, on the my bookshelf tab "sort by" .. click on that and you can choose A - Z, date published, date indexed, date added to library etc etc.. unfortunately you have to do it each time you log in as we don't appear to have a properties setting as of yet that allows preferences to be set.
I'm not sure, but I think that the default is date added to EYB library.
And, "rivergait" it sounds like you actually have a really good visual memory!