Hey @checevo. Need a bit more context. How are you pages structured/organized within the WordPress admin? It's hierarchy based. The plugin doesn't split up a VERY long page of content into multiple pages (if that's how I understand you are using it). It simply takes al the sibling pages and creates next and previous links to those sibling pages.
Example (in the admin if you had your pages set in this structure)
- My Section
- My child page 1
- My child page 2
- My child page 3
And let's say you are on Page 2. Your [next_page_link] Would link to page 3 and [previous_page_link] Would link to Page 1.
Depending on settings you can have it crawl out to the parent pages as well (though not typical). Additionally it the shortcode can loop around