Issue with pagination throught multiQuery

[m4gz]

I have archive page with pagination - http://stackoverflow.com/questions/39105885/multisite-pagination-issue-by-multi-query-archive-404
Paginate by that custom function http://sgwordpress.com/teaches/how-to-add-wordpress-pagination-without-a-plugin/

And the issue is - for example i have 3 posts on the mainsite, and 1+1+1 on the subsites and 1 post per page. $query->max_num_pages return correct number of all posts (3+1+1+1 = 6) and im getting correct pagination with 6 pages, but surfing after 3rd page (number of posts at the mainsite) im getting 404. I think it happends because WP 'thinking' that i have only 3 paginations, because he stored 3 posts and 1 per page (mainsite) and i need to change his 'posts'/'posts_per_page' to 'multi_posts'/'posts_per_page'.

I can not figure out how to solve it, can somebody help me?