Showing double navigation

I am using wordpress Focus theme and I replaced default navigation links with WP-PageNavi navigation.

But there is a problem…
In first and last page navigation shows ok:
https://postimg.org/image/tlrbm4tzn/ (screenshot)
But in other pages shows like this:
https://postimg.org/image/keb7xildt/ (screenshot)

Default navigation code:

<?php elseif ( $wp_query->max_num_pages > 1 && ( is_home() || is_archive() || is_search() ) ) : // navigation links for home, archive, and search pages ?>

		<?php if ( get_next_posts_link() ) : ?>
		<div class="nav-previous"><?php next_posts_link( __( '<span class="meta-nav">&larr;</span> Older posts', 'focus' ) ); ?></div>
		<?php endif; ?>

		<?php if ( get_previous_posts_link() ) : ?>
		<div class="nav-next"><?php previous_posts_link( __( 'Newer posts <span class="meta-nav">&rarr;</span>', 'focus' ) ); ?></div>
		<?php endif; ?>

	<?php endif; ?>

And code after PageNavi instructions:

<?php elseif ( $wp_query->max_num_pages > 1 && ( is_home() || is_archive() || is_search() ) ) : // navigation links for home, archive, and search pages ?>

		<?php if ( get_next_posts_link() ) : ?>
		<?php wp_pagenavi(); ?>
		<?php endif; ?>

		<?php if ( get_previous_posts_link() ) : ?>
		<?php wp_pagenavi(); ?>
		<?php endif; ?>

	<?php endif; ?>

What I need to change in code? Please help!

https://www.ads-software.com/plugins/wp-pagenavi/