functions.php

<?php

/**
 * DPS, include sticky posts in posts_per_page calculation 
 * @see https://wordpress.org/support/topic/number-of-posts-with-sticky/
 */
function be_dps_include_sticky_count( $output, $atts ) {

  global $be_post_counter;
  if( empty( $be_post_counter ) )
    $be_post_counter = 1;
  else 
    $be_post_counter++;
    
  $posts_per_page = !empty( $atts['posts_per_page'] ) ? intval( $atts['posts_per_page'] ) : get_option( 'posts_per_page' );
  if( $be_post_counter > $posts_per_page )
    $output = '';
    
  return $output;
  
}
add_filter( 'display_posts_shortcode_output', 'be_dps_include_sticky_count', 10, 2 );