As I have look into your plugin configuration tutorial, as I have observed the jetpack settings is not the same look as the one in your settings.

Maybe you missed something with jetpack updates, as there are lot of options now for scrolling something like

Load more posts using the default theme behavior
Load more posts in page with a button
Load more posts as the reader scrolls down

Optimize your site for smartphones
Use excerpts instead of full posts on front page and archive pages
Show featured images
Show an ad for the WordPress mobile apps in the footer of the mobile theme

Hope you will have fix for this
thank you