Wordpress custom pagination shows same posts on every page - php

Question

I have been trying to add custom numeric pagination to my custom Wordpress theme. Everything seems good so far but the problem is that every page shows the same 3 posts. Is there something I should consider doing while building my own Wordpress blog theme. Right now I have my page-archive.php and single.php file there, do I need something else for this to work? Also filtering with category isn't working, it keeps sending me back to index.php
Code in my index.php file
<div class="blogitem a">
<?php
//PRINT ONLY Tutvustus
$lastBlog = new WP_Query('type=post&posts_per_page=3');
if( $lastBlog->have_posts() ):
while( $lastBlog->have_posts() ): $lastBlog->the_post(); ?>
<?php get_template_part('page-archive',get_post_format()); ?>
<?php endwhile;
endif;
wp_reset_postdata();
?>
<div class="pagination">
<?php
if ( get_query_var('paged') ) { $paged = get_query_var('paged'); }
elseif ( get_query_var('page') ) { $paged = get_query_var('page'); }
else { $paged = 1; }
query_posts(array(
'post_type' => 'post',
'paged' => $paged,
'posts_per_page' => 2
));
if ( have_posts() ) : ?>
<?php while ( have_posts() ) : the_post(); ?>
<?php?>
<?php endwhile; ?>
<?php my_pagination(); ?>
<?php else : ?>
<?php ?>
<?php endif; ?>
</div>
</div>
Code in my functions.php file
if ( ! function_exists( 'my_pagination' ) ) :
function my_pagination() {
global $wp_query;
$big = 999999999;
echo paginate_links( array(
'base' => str_replace( $big, '%#%', esc_url( get_pagenum_link( $big ) ) ),
'format' => '?paged=%#%',
'current' => max( 1, get_query_var('paged') ),
'total' => $wp_query->max_num_pages
) );
}
endif;
I modified my page-archives.php file to this code.
<?php
/*
Template Name: Archives
*/
get_header(); ?>
<div id="container">
<div id="content" role="main">
<?php the_post(); ?>
<h1 class="entry-title"><?php the_title(); ?></h1>
</div><!-- #content -->
</div><!-- #container -->
<?php get_footer(); ?>
Now my filtering with category is working but if I choose second page from the pagination it doens't show any posts.

Answer 1

I think you need wp_reset_query... some helpful links:
https://developer.wordpress.org/reference/functions/wp_reset_query/
https://developer.wordpress.org/reference/functions/query_posts/
see example here:
<div class="blogitem a">
<?php
//PRINT ONLY Tutvustus
$lastBlog = new WP_Query('type=post&posts_per_page=3');
if( $lastBlog->have_posts() ):
while( $lastBlog->have_posts() ): $lastBlog->the_post(); ?>
<?php get_template_part('catalog',get_post_format()); ?>
<?php endwhile;
endif;
wp_reset_postdata();
?>
<div class="pagination">
<?php
if ( get_query_var('paged') ) { $paged = get_query_var('paged'); }
elseif ( get_query_var('page') ) { $paged = get_query_var('page'); }
else { $paged = 1; }
query_posts(array(
'post_type' => 'post',
'paged' => $paged,
'posts_per_page' => 2
));
if ( have_posts() ) : ?>
<?php while ( have_posts() ) : the_post(); ?>
<?php?>
<?php endwhile; ?>
<?php my_pagination(); ?>
<?php else : ?>
<?php ?>
<?php endif; ?>
<?php wp_reset_query(); // add this ?>
</div>
</div>

Answer 2

It turns out I am silly and I don't need the first half of the code anyways.
<div class="pagination">
<?php
if ( get_query_var('paged') ) { $paged = get_query_var('paged'); }
elseif ( get_query_var('page') ) { $paged = get_query_var('page'); }
else { $paged = 1; }
query_posts(array(
'post_type' => 'post', // You can add a custom post type if you like
'paged' => $paged,
'posts_per_page' => 2
));
if ( have_posts() ) : ?>
<?php while ( have_posts() ) : the_post(); ?>
<?php get_template_part('catalog',get_post_format()); ?> // added template part here and voila it works
<?php endwhile; ?>
<?php my_pagination(); ?>
<?php else : ?>
<?php ?>
<?php wp_reset_query(); // add this ?>
<?php endif; ?>
</div>