If multiple shortcodes are present, only the first shows

The shortcode I am using is based off the foobar shortcode example in the codex. In particular the shortcode takes the following form:

[my_shortcode]

Not sure what this type is called.

Here’s the code for my shortcode, I more or less copied the example from the codex:

<?php
// List links
function link_list($atts) {
    global $wpdb;

    // Defaults for the shortcode
    extract(shortcode_atts(
            array('num' => 100), $atts
    ));

    // Get the information from the database
    $table_name = $wpdb -> prefix . "links";
    $links    = $wpdb -> get_results("select * from $table_name where accepted = '1' limit {$num}");

    return build_form($links, 'List Plugin');
}

// Get the newest links from the database
function link_newest($atts) {
    global $wpdb;

    // Defaults for the shortcode
    extract(shortcode_atts(
            array('num' => 25), $atts
    ));

    // Get the information from the database
    $table_name = $wpdb -> prefix . "links";
    $links    = $wpdb -> get_results("select * from $table_name where accepted = '1' order by id desc limit {$num}");

    return build_form($links, 'List Plugin - Newest links');
}

// Get the recently visited links from the database
function link_visited($atts) {
    global $wpdb;

    // Defaults for the shortcode
    extract(shortcode_atts(
            array('num' => 25), $atts
    ));

    // Get the information from the database
    $table_name = $wpdb -> prefix . "links";
    $links    = $wpdb -> get_results("select * from $table_name where accepted = '1' order by time desc limit {$num}");

    return build_form($links, 'List Plugin - Recently Visted links');
}

// Add the previous functions to the Shortcode
add_shortcode('newest_links', 'link_newest');
add_shortcode('visited_links', 'link_visited');
add_shortcode('list_links', 'link_list');
?>

or on PasteBin: http://pastebin.com/d694ea769

See anything wrong with that?