Getting value from get_post_custom

I have added a custom meta box to a category that shows up fine. The only purpose of this metabox is to supply a link to the post. I can see that the box works because my test link is saved in the box. Now I am trying to get the value on the front end but having a little trouble.

Here is the metabox:

function cd_meta_box_cb()
{
        global $post;
        $values = get_post_custom( $post->ID );
        $text = isset( $values['link'] ) ? esc_attr( $values['link'][0] ) : '';

        wp_nonce_field( 'tickets_link_nonce', 'meta_box_nonce' );

        ?><label for="link">Tickets Link</label>
      <input type="text" name="link" id="link" value="<?php echo $text; ?>" /><?php
}

add_action( 'save_post', 'cd_meta_box_save' );
function cd_meta_box_save( $post_id )
{
    // Bail if we're doing an auto save
    if( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;

    // if our nonce isn't there, or we can't verify it, bail
    if( !isset( $_POST['meta_box_nonce'] ) || !wp_verify_nonce( $_POST['meta_box_nonce'], 'tickets_link_nonce' ) ) return;

    // if our current user can't edit this post, bail
    if( !current_user_can( 'edit_post' ) ) return;

         $allowed = array(
        'a' => array( // on allow a tags
            'href' => array() // and those anchors can only have href attribute
        )
    );

        if( isset( $_POST['link'] ) ) {
        update_post_meta( $post_id, 'link', wp_kses( $_POST['link'], $allowed ) );
}

Here is the current version of my code on the front end.

 $tickets = array();
 $tickets = get_post_custom($post->ID); ?>

 <?php if( !empty($tickets['link'])): ?>
      <a href="<?php echo $tickets[0]; ?>" class="tickets_btn">Tickets</a>
 <?php endif; ?>

I have gotten it to display the link in the first post. I have two issues I am trying to figure out.

  1. There are 12 posts in the category and even though the metabox value for post two is empty, it still shows a blank link

  2. I am getting undefined indexes on the other posts.

Here is a print_r on the array

(
    [_thumbnail_id] => Array
        (
            [0] => 1865
            [1] => 1865
        )

    [_edit_last] => Array
        (
            [0] => 1
            [1] => 1
        )

    [_am_city] => Array
        (
            [0] => The Dome
            [1] => The Dome
        )

    [tooltip] => Array
        (
            [0] => Come down to the Dome
        )

    [panels_data] => Array
        (
            [0] => a:0:{}
        )

    [_edit_lock] => Array
        (
            [0] => 1416882347:1
        )

    [ninja_forms_form] => Array
        (
            [0] => 0
        )

    [link] => Array
        (
            [0] => http://testlink.com
        )

    [_am_showdates] => Array
        (
            [0] => <p>27</p>DEC
        )

    [_am_location] => Array
        (
            [0] => The Dome
        )

    [_am_state] => Array
        (
            [0] => Detroit, Mi
        )

)

I am trying to get the [link] => http://testlink.com

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