Issue getting group to save/load on front end

Okay, two issues with my groups. Firstly, I can't save more than 1 set of records. Every time I "Add more" the first record is replaced and none of the others save.

Secondly, it doesn't want to display properly on the front end. I want it to display conditionally, if there are records.

What have I messed up?

//Panelists

	$meta_boxes[] = array(
			'title'      => 'Panelists',
			'context'    => 'normal',
			'priority'   => 'high',
			'post_types' => 'events',
			'desc'       => '(drag to reorder)',
			'fields' 	 => array(
				array(
						'id'         => 'radix_panelists',
						'type'       => 'group',
						'clone'      => true,
						'sort_clone' => true,
						'fields'     => array(
							array(
									'name'  => 'Name',
									'id'    => $prefix . 'panelistname',
									'type'  => 'text',
									'desc'  => 'Name of panelist',
							),
							array(
									'name'  => 'URL',
									'id'    => $prefix . 'panelisturl',
									'type'  => 'text',
									'desc'  => 'Link or mailto: for panelist',
							),
							array(
									'name'  => 'Profile Pic',
									'id'    => $prefix . 'panelistpic',
									'type'  => 'file_input',
									'desc'  => 'Profile picture of panelist',
							),
					),
				),
			),
	);

    return $meta_boxes;

And then on the page template:

	// Speakers

	$speakergroup = rwmb_meta( 'radix_panelists' );

	if ( ! empty( $speakergroup ) ) {

		echo '<div class="eventspeakers">';

		echo '<h1>Speakers</h1>';

		// Call Panelist Data

		foreach ( $speakergroup as $speakerdata ) {
					echo '<div class="eventspeaker">';

if ( ! empty ($speakerdata['radix_panelistpic'])) {
			$attachment_id = attachment_url_to_postid( $speakerdata['radix_panelistpic'] );
  	list( $src ) = wp_get_attachment_image_src( $attachment_id, 'thumbnail' );
  	echo '<a href="' . $speakerdata['radix_panelisturl'] . '" target=_blank><img src="' . $src . '"></a>';
			} else {
echo '<a href="' . $speakerdata['radix_panelisturl'] . '" target=_blank><img src="' . get_bloginfo( 'stylesheet_directory' ) . '/images/default-profile.jpg"></a>';

	
}
			echo '<div class="speakername"><a href="' . $speakerdata['radix_panelisturl'] . '" target=_blank>' . $speakerdata['radix_panelistname'] . '</a></div>';

			echo '</div>';

		}

		echo '</div>';

	}

	else {

	}