Order Wordpress custom posts by custom feilds - wordpress

Question

I am trying to order custom posts by custom fields. this is my code.
$paged = get_query_var('paged') ? get_query_var('paged') : 1;
$args = array(
'post_type' => 'pql_Servay',
'paged' => $paged,
'post_status' => 'publish',
'posts_per_page' => 2,
'orderby' => 'meta_value',
'orderby' => 'meta_value_num',
'meta_key' => 'question_order',
'order' => 'ASC'
);
This code works for displaying all posts on a single page. But I want to display one post per page.
I am using this code to get next post page link.
Next Post
But When I click this link next page also shows the first post. In short next post is displaying the same post on the first page.
I am creating a shortcode to display these posts.
Here is complete shortcode
<?php
add_shortcode( 'PreQualifyingLeads', 'PreQualifyingLeads_shortcode');
function PreQualifyingLeads_shortcode(){
$paged = get_query_var('paged') ? get_query_var('paged') : 1;
$args = array(
'post_type' => 'pql_Servay',
'paged' => $paged,
'post_status' => 'publish',
'posts_per_page' => 2,
'orderby' => 'meta_value',
'orderby' => 'meta_value_num',
'meta_key' => 'question_order',
'order' => 'ASC'
);
?>
<div class="pql-wrapper">
<div class="title-wrapper">
<h2>This is page Title </h2>
</div>
<div class="Question-Wrapper">
<?php
$loop = new WP_Query( $args );
if($loop->have_posts()){
while ( $loop->have_posts() ) {
$loop->the_post();
echo the_title( ).'<br>';
}
}
wp_reset_postdata( );
?>
Next Post
</div>
</div>
<?php
}

Answer 1

You need to add paged parameter in your query like following:
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
'paged' => $paged
Your wp query should look like the following:
$paged = get_query_var('paged') ? get_query_var('paged') : 1;
$args = array(
'post_type' => 'pql_Servay',
'paged' => $paged
'post_status' => 'publish',
'posts_per_page' => 1,
'orderby' => 'meta_value',
'orderby' => 'meta_value_num',
'meta_key' => 'question_order',
'order' => 'ASC'
);

Answer 2

Try this may be its run
$args = array(
'post_type' => 'pql_Servay',
'paged' => $paged
'post_status' => 'publish',
'posts_per_page' => 1,
'orderby' => array(
'question_order'=>'ASC
)
);