Multiple Loop respecting the Navigation/Pagination.

hello guys,
First of all i anna say i’ve tried everything, nothing working, i really need help…
so i have two loops runnings, no problems so far, but the problem is the pagination, which is only determined by the second loop ‘posts_per_page’ argument, and not regarding the total number of posts in the page (fist loop + second loop),

so on the first page i have the posts wich are in the first loop and the 5 first posts of the second loop, so can be 9 in total,
and then on second page i have 5 post in total, etc….
My code :

<?php
$currentid = get_query_var('cat');
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
/* Start loop */
 if ( $paged < 2 ) :
 $query_city = new WP_Query('cat='.$currentid.'&category_name=cidades&paged='.$paged);
  while ($query_city->have_posts()) : $query_city->the_post(); ?>
    <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>

      <div class="entry-content">
      	 <?php echo get_the_post_thumbnail($page->ID, 'tumb-post'); ?>
      	 <header>
        	<h5><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h5>
       		<?php if($currentid == 7){roots_entry_meta();}  ?>
     	 </header>
        <?php if (is_archive() || is_search()) { ?>
          <?php the_excerpt(); ?>
        <?php } else { ?>
          <?php the_content(); ?>
        <?php } ?>
      </div>
      <footer>
      </footer>
    <?php roots_post_inside_after(); ?>
    </article>
  <?php roots_post_after(); ?>
  <?php endwhile; ?>
  <?php endif; ?>

<?php
$temp = $wp_query;
$wp_query= null;
$wp_query = new WP_Query();
$wp_query->query('cat='.$currentid.',-61&paged='.$paged.'&posts_per_page='.$post_per_page);
if ($wp_query->have_posts()) : while ($wp_query->have_posts()) : $wp_query->the_post(); ?>
    <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>

      <div class="entry-content">
      	 <?php echo get_the_post_thumbnail($page->ID, 'tumb-post'); ?>
		<header>
        	<h5><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h5>
         	<?php if($currentid == 7){roots_entry_meta();}  ?>
     	</header>
          <?php the_excerpt(); ?>
      </div>
      <footer>
      </footer>
    <?php roots_post_inside_after(); ?>
    </article>
<?php endwhile; endif; /* End loop */
?>
<?php /* Display navigation to next/previous pages when applicable */ ?>
  <nav id="post-nav" class="pager">
    <div class="previous"><?php next_posts_link(__('&larr; Older posts', 'roots')); ?></div>
    <div class="next"><?php previous_posts_link(__('Newer posts &rarr;', 'roots')); ?></div>
  </nav>
<?php $wp_query = null; $wp_query = $temp;?>

so the problem is that the first page contain X posts from first query and then 5 posts,(for ex 9 in total) but i want to have 5 posts in total on every page, even the first page!!
the option posts_per_page is determined in each query, i dont know how to keep this option for the total of posts on the page,
i have tried to change this option depending on the page like this

$post_per_page = $paged==1 ? 1 : 5;
$wp_query->query('cat='.$currentid.',-61&paged='.$paged.'&posts_per_page='.$post_per_page);

but it’s not working…

I really need help as im going crazy….
Thanks!!