Update: In order to clarify, I have 3 sections of WPSP in the same page, which shows 3 posts, 3 posts and 6 posts. In the last one I had use the WPSP Pro AJAX LOADING, but when i click on “load more” it load more posts of the 6posts section but also loads more posts for the above 3 and 3 posts.
Having multiple lists on a page with pagination likely isn’t a good idea inside WordPress. I can think of a handful of issues that could arise if that was a thing.