Repeating some of my posts in second blog page

Hello,

I have a blog page that has a couple of loops (loop A and loop B). I have a do_not_duplicate line in loop B. And loop A is only running in my first page of my blog. My problem is this:

First page of my blog: Loop A gives me posts number 1,2,3,4. Loop B, because of the do_not_duplicate line, gives me 5,6,7,8,9,10,11,12,13,14. That’s my blog page. Just what I want.

Second page in my blog: When I press older posts (2nd page), I will get in loop B posts 11,12,13,14,15,16,17,18,19,20 and nothing in loop A as it is not running here. So I will get a repetition of 11,12,13,14 posts in the 2nd page of my blog. I would like to get the posts from 14 to 23, so I don’t get any repetition.

1.- Loop number A is:

if ( is_home() && ! is_paged() ) {
$args_alj = array(
		'cat' => 64,
		'posts_per_page' => 4,
		'orderby' => rand,
		);
$queryb = new WP_Query( $args_alj );
while ( $queryb->have_posts() ) : $queryb->the_post();
$do_not_duplicate[] = $post->ID;
get_template_part( 'template-parts/content-front', get_post_format() );
endwhile;
}

2.- Loop B is:

$args_lat = array(
		'post__not_in' => $do_not_duplicate,
		'paged' => get_query_var('paged'),
		);
$latest = new WP_Query( $args_lat );
while ( $latest->have_posts() ) : $latest->the_post();		get_template_part( 'template-parts/content', get_post_format() );
endwhile;