This is so cool! All it took was an email to our host, Lazeez.
My NiS stories are now a Series called Naked in Central High School, and the Series shows in the Naked in School Universe. Just scroll down to the end of the Universe's page and there it is, the stories listed in the order in which they should be read. When next I do another story I can add it to the series.
On my page each story is tagged as being part of the Series, the way it should be. Click on the Series name and you get them all in order.
In short, this only proves that sometimes you can have your cake and eat it, too. My heartfelt thanks to Lazeez for his help at solving my problem.
Oh, and if you understand that the Authors' Instructions on managing Series and Universes are aimed at PRIVATE Series and Universes they make sense. NIS is a Public Universe, so the rules are somewhat different.