theme related question (breadcrumbs)

Hello again,

I have 1 final step to make everything perfect.

http://www.outdoorhaber.com/soru-cevap

As you see the braincrumbs is missing. but it works on the rest of the web site http://www.outdoorhaber.com/genel for example.

my theme provider's support advised me to put these codes at the end of theme's header.php

<div id="breadcrumbs" class="mybread">
<?php if(function_exists('bcn_display')) { bcn_display(); }
else { ?>
<a href="<?php echo home_url(); ?>"><?php esc_html_e('Home','Aggregate') ?></a> <span class="raquo">&raquo;</span>

<?php if( is_tag() ) { ?>
<?php esc_html_e('Posts Tagged ','Aggregate') ?><span class="raquo">&quot;</span><?php single_tag_title(); echo('&quot;'); ?>
<?php } elseif (is_day()) { ?>
<?php esc_html_e('Posts made in','Aggregate') ?> <?php the_time('F jS, Y'); ?>
<?php } elseif (is_month()) { ?>
<?php esc_html_e('Posts made in','Aggregate') ?> <?php the_time('F, Y'); ?>
<?php } elseif (is_year()) { ?>
<?php esc_html_e('Posts made in','Aggregate') ?> <?php the_time('Y'); ?>
<?php } elseif (is_search()) { ?>
<?php esc_html_e('Search results for','Aggregate') ?> <?php the_search_query() ?>
<?php } elseif (is_single()) { ?>
<?php $category = get_the_category();
$catlink = get_category_link( $category[0]->cat_ID );
echo ('<a href="'.esc_url($catlink).'">'.esc_html($category[0]->cat_name).'</a> '.'<span class="raquo">&raquo;</span> '.get_the_title()); ?>
<?php } elseif (is_category()) { ?>
<?php single_cat_title(); ?>
<?php } elseif (is_author()) { ?>
<?php esc_html_e('Posts by ','Aggregate'); echo ' ',$curauth->nickname; ?>
<?php } elseif (is_page()) { ?>
<?php wp_title(''); ?>
<?php }; ?>
<?php }; ?>
</div> <!-- end #breadcrumbs -->

When I put these codes into the header.php of my theme, the breadcrumbs appear on http://www.outdoorhaber.com/soru-cevap but on the rest of the site double breadcrumbs appear.

How can I make/assign this code specific to Q&A plugin ?

Any answer will highly be appreciated.