Single page. Post View Count get twice views on single.php

I have a problem with Post View Count. If reads data from a list of different page than a single.php loop correctly poking 1 view. On single.php loops displays the article my count poking twice.

Even on a single page as a single loops do nothing it does not.

Displaying custom post type as singles.

Where to find a solution to this error?
in single.php

I set the loop for custom post type

<? php setPostViews (get_the_ID ());?>

on the other side which is not single meter to display the results of visits to the list of articles
<? php echo getPostViews (get_the_ID ());?>

in another template post view count work fine.

My Function.php (post view count)

// function to display number of posts.
function getPostViews($postID){
    $count_key = 'post_views_count';
    $count = get_post_meta($postID, $count_key, true);
    if($count==''){
        delete_post_meta($postID, $count_key);
        add_post_meta($postID, $count_key, '0');
        return "0 View";
    }
    return $count.' Views';
}

// function to count views.
function setPostViews($postID) {
    $count_key = 'post_views_count';
    $count = get_post_meta($postID, $count_key, true);
    if($count==''){
        $count = 0;
        delete_post_meta($postID, $count_key);
        add_post_meta($postID, $count_key, '0');
    }else{
        $count++;
        update_post_meta($postID, $count_key, $count);
    }
}

// Add it to a column in WP-Admin
add_filter('manage_posts_columns', 'posts_column_views');
add_action('manage_posts_custom_column', 'posts_custom_column_views',5,2);
function posts_column_views($defaults){
    $defaults['post_views'] = __('Views');
    return $defaults;
}
function posts_custom_column_views($column_name, $id){
	if($column_name === 'post_views'){
        echo getPostViews(get_the_ID());