The assigned and marvel records were intended to appear on our DVDs as a page with text, an extra of sorts. After all, the aired order is how people saw them. Then again you do make a good point and I'll start a poll about what order would you guys prefer to have them in.
When authoring why not put the option to watch the episodes in assigned, marvel record, or aired? It will not be hard to do and will not take up any more disc space than is already being used. It is really a very simple process and would make your final discs look much more professional. Stories in DVD Studio Pro will do the trick for this very easily.