I have two articles in a folio. Both individual articles swipe vertically within the article. When I horizontally swipe from Article One to Article Two, how do set it so that you can only swipe to the 1st page of that article Two (even if I had previously been viewing the 3rd page of Article Two)... and visa versa?
You can't. At least not without tweaking the whole Content Viewer's framework, which is only available for Enterprise customers. And even then, I think it would be highly advised not to mess with this carefully growing convention in its user interface. Of course, you can turn each article/page completely into HTML content and script your and your reader's brain out. But as a best practice, you can't and shouldn't. The user needs to retain their sense of 'position' in a publication and each article.