<?php

$posts_per_page = 1; // how many posts per term

$post_count = $i =  0;
$custom_terms = get_terms( 'issues', array( 'parent' => 0) );

if($custom_terms) :
	foreach ( $custom_terms as $term ) {
		$post_type_count = (int) get_term_post_type_count( $term->term_id, 'issues', 'news');
		if($post_type_count > $post_count)
			$post_count = $post_type_count;

		$custom_terms[$i]->count_post_type = $post_type_count;
		++$i;
	}

	if($post_count > 2){
		global $wp_query;
		$wp_query->max_num_pages = ceil( $post_count / $posts_per_page );
	}

	$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;

	foreach ( $custom_terms as $custom_term ) :

		$args = array(
		  'post_type'      => 'news',
		  'posts_per_page' => $posts_per_page,
		  'paged' => $paged,
		  'tax_query'      => array(
		    array(
		      'taxonomy' => 'issues',
		      'field'    => 'slug',
		      'terms'    => $custom_term->slug,
		      'include_children' => 0
		    ),
		  )
		);

		if( is_paged() ){
			$args['offset'] = ($paged-1) * $posts_per_page;
		}

		$loop = new WP_Query($args);
		if($loop->have_posts()) :
			echo '<h2>Edition '.$custom_term->name.'</h2>';?>
			<h4 class="h6"><?php echo date('l jS F Y'); ?></h4>

			<!-- start of loop -->
			<?php while($loop->have_posts()) : $loop->the_post(); ?>

				<!-- put your loop code here -->
				<p><?php the_title(); ?></p>

				<?php endwhile; ?>
			<!-- end of loop -->
			<?php wp_reset_postdata(); ?>
		<?php endif; ?>
	<?php endforeach; ?>
<?php endif; ?>

<!-- pagination functions -->
	<div class="nav-previous alignleft"><?php next_posts_link( 'Older posts' ); ?></div>
	<div class="nav-next alignright"><?php previous_posts_link( 'Newer posts' ); ?></div>