wp_query page navigation for custom post type (Joints WP Theme)

I am struggling to understand why the built in page navigation of jointswp.com is not working with my custom page template. First off, great theme! I am sure it is something on my end that is causing the issue. I am trying to pull a maximum of 6 posts from my custom post type of “portfolio”, the rest of the posts I want to be displayed with pagination. My exact code works perfectly on an archive page, but on a page template the navigation doesn’t display. Any help would be appreciated. Thanks

<?php
/*
Template Name: Portfolio Page
*/
?>
<?php get_header(); ?>
	<div class="row section-row-container">
		<div class="large-12 medium-12 small-12 columns section-title-container">
			<h2 class="page-title"><?php the_title(); ?></h2>
		</div>
	</div>
	<div id="gridcontainer">
		<?php
		$type = 'portfolio';
		$args = array(
		  'post_type' => $type,
		  'post_status' => 'publish',
		  'posts_per_page' => 6);
		$my_query = null;
		$my_query = new WP_Query($args);
		$counter = 1; //start counter
		$grids = 2; //Grids per row
		if( $my_query->have_posts() ) { ?>
			<div class="row section-row-container">
				<?php while ($my_query->have_posts()) : $my_query->the_post();
				if($counter == 1) : ?>

				<div class="griditemleft">
					<div class="postimage">
						<a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>"><?php the_post_thumbnail('category-thumbnail'); ?></a>
					</div>
		            <h2><a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a></h2>
		            <p class="post-date-portfolio">Posted On <time datetime="<?php echo the_time('Y-m-j'); ?>" pubdate><?php the_time('F jS, Y'); ?></time>  	<?php
						$categories = get_the_category();
						if ( ! empty( $categories ) ) {
						    echo '| <a href="' . esc_url( get_category_link( $categories[0]->term_id ) ) . '">' . esc_html( $categories[0]->name ) . '</a>';
						}
					?></p>
				</div>
				<?php elseif($counter == $grids) : ?>
				<div class="griditemright">
					<div class="postimage">
						<a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>"><?php the_post_thumbnail('category-thumbnail'); ?></a>
					</div>
					<h2><a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a></h2>
					<p class="post-date-portfolio">Posted On <time datetime="<?php echo the_time('Y-m-j'); ?>" pubdate><?php the_time('F jS, Y'); ?></time>  	<?php
						$categories = get_the_category();
						if ( ! empty( $categories ) ) {
						    echo '| <a href="' . esc_url( get_category_link( $categories[0]->term_id ) ) . '">' . esc_html( $categories[0]->name ) . '</a>';
						}
					?></p>
				</div>
				<div class="cleargrid"></div>
				<?php
				$counter = 0;
				endif;
				?>
				<?php
				$counter++;
				endwhile;?>
			</div>
		<?php
		}
		wp_reset_postdata();
		?>
		</div>
		<?php joints_page_navi(); ?>
<?php get_footer(); ?>

Here is the code for the joints_page_navi();

<?php
// Numeric Page Navi (built into the theme by default)
function joints_page_navi($before = '', $after = '') {
	global $wpdb, $wp_query;
	$request = $wp_query->request;
	$posts_per_page = intval(get_query_var('posts_per_page'));
	$paged = intval(get_query_var('paged'));
	$numposts = $wp_query->found_posts;
	$max_page = $wp_query->max_num_pages;
	if ( $numposts <= $posts_per_page ) { return; }
	if(empty($paged) || $paged == 0) {
		$paged = 1;
	}
	$pages_to_show = 7;
	$pages_to_show_minus_1 = $pages_to_show-1;
	$half_page_start = floor($pages_to_show_minus_1/2);
	$half_page_end = ceil($pages_to_show_minus_1/2);
	$start_page = $paged - $half_page_start;
	if($start_page <= 0) {
		$start_page = 1;
	}
	$end_page = $paged + $half_page_end;
	if(($end_page - $start_page) != $pages_to_show_minus_1) {
		$end_page = $start_page + $pages_to_show_minus_1;
	}
	if($end_page > $max_page) {
		$start_page = $max_page - $pages_to_show_minus_1;
		$end_page = $max_page;
	}
	if($start_page <= 0) {
		$start_page = 1;
	}
	echo $before.'<div class="row section-row-container"><nav class="page-navigation"><ul class="pagination">'."";
	if ($start_page >= 2 && $pages_to_show < $max_page) {
		$first_page_text = __( "First", 'jointstheme' );
		echo '<li><a href="'.get_pagenum_link().'" title="'.$first_page_text.'">'.$first_page_text.'</a></li>';
	}
	echo '<li>';
	previous_posts_link('<<');
	echo '</li>';
	for($i = $start_page; $i  <= $end_page; $i++) {
		if($i == $paged) {
			echo '<li class="current"><a href="'.get_pagenum_link($i).'">'.$i.'</a></li>';
		} else {
			echo '<li><a href="'.get_pagenum_link($i).'">'.$i.'</a></li>';
		}
	}
	echo '<li>';
	next_posts_link('>>');
	echo '</li>';
	if ($end_page < $max_page) {
		$last_page_text = __( "Last", 'jointstheme' );
		echo '<li><a href="'.get_pagenum_link($max_page).'" title="'.$last_page_text.'">'.$last_page_text.'</a></li>';
	}
	echo '</ul></nav></div>'.$after."";
} /* End page navi */

?>

Thanks!