Frontpage title is duplicated

Hello,

When I inspect my site with firebug I see that my title is duplicated, and I see the same information separated by this symbol | And I was told that this is very bad for SEO.

This is what I see with firebug in my frontpage:
<title>
Tu samsung Galaxy S5 | Tu samsung Galaxy S5
</title>

And in a post:
<title>
Samsung Galaxy S5: Apuntando a la cámara | Tu samsung Galaxy S5Tu samsung Galaxy S5
</title>

Here’s the php code:

<title><?php
global $page, $paged;
wp_title( '|', true, 'right' );
bloginfo( 'name' );
$site_description = get_bloginfo( 'description', 'display' );
if ( $site_description && ( is_home() || is_front_page() ) )
echo " | $site_description";
if ( $paged >= 2 || $page >= 2 )
echo ' | ' . sprintf( __( 'Page %s', 'PressLayer' ), max( $paged, $page ) );
?></title>

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Do you know what is the problem?

Thanks,
David