Changes in client email display correctly but in admin not

Hi,

I modified the template of the email_order_items by only adding a new column and it displays correctly in the client email. But in the admin email it does not display, and is like it doesn’t exist. I also added a <th> in email_order_details with the header of the column. That’s it!

Can you please help? Thank you!

<?php
/**
 * Email Order Items
 *
 * This template can be overridden by copying it to yourtheme/woocommerce/emails/email-order-items.php.
 *
 * HOWEVER, on occasion WooCommerce will need to update template files and you
 * (the theme developer) will need to copy the new files to your theme to
 * maintain compatibility. We try to do this as little as possible, but it does
 * happen. When this occurs the version of the template file will be bumped and
 * the readme will list any important changes.
 *
 * @see 	    https://docs.woocommerce.com/document/template-structure/
 * @author 		WooThemes
 * @package 	WooCommerce/Templates/Emails
 * @version     2.1.2
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

foreach ( $items as $item_id => $item ) :
	$_product     = apply_filters( 'woocommerce_order_item_product', $order->get_product_from_item( $item ), $item );
	$item_meta    = new WC_Order_Item_Meta( $item, $_product );

	if ( apply_filters( 'woocommerce_order_item_visible', true, $item ) ) {
		?>
		<tr class="<?php echo esc_attr( apply_filters( 'woocommerce_order_item_class', 'order_item', $item, $order ) ); ?>">
			<td class="td" style="text-align:left; vertical-align:middle; border: 1px solid #eee; font-family: 'Helvetica Neue', Helvetica, Roboto, Arial, sans-serif; word-wrap:break-word;"><?php

				// Show title/image etc
				if ( $show_image ) {
					echo apply_filters( 'woocommerce_order_item_thumbnail', '<div style="margin-bottom: 5px"><img src="' . ( $_product->get_image_id() ? current( wp_get_attachment_image_src( $_product->get_image_id(), 'thumbnail') ) : wc_placeholder_img_src() ) .'" alt="' . esc_attr__( 'Product Image', 'woocommerce' ) . '" height="' . esc_attr( $image_size[1] ) . '" width="' . esc_attr( $image_size[0] ) . '" style="vertical-align:middle; margin-right: 10px;" /></div>', $item );
				}

				// Product name
				echo apply_filters( 'woocommerce_order_item_name', $item['name'], $item, false );

				// SKU
				if ( $show_sku && is_object( $_product ) && $_product->get_sku() ) {
					echo ' (#' . $_product->get_sku() . ')';
				}

				// allow other plugins to add additional product information here
				do_action( 'woocommerce_order_item_meta_start', $item_id, $item, $order, $plain_text );

				// Variation
				if ( ! empty( $item_meta->meta ) ) {
					echo '<br/><small>' . nl2br( $item_meta->display( true, true, '_', "\n" ) ) . '</small>';
				}

				// File URLs
				if ( $show_download_links ) {
					$order->display_item_downloads( $item );
				}

				// allow other plugins to add additional product information here
				do_action( 'woocommerce_order_item_meta_end', $item_id, $item, $order, $plain_text );

			?></td>
			<td class="td" style="text-align:left; vertical-align:middle; border: 1px solid #eee; font-family: 'Helvetica Neue', Helvetica, Roboto, Arial, sans-serif;"><?php echo apply_filters( 'woocommerce_email_order_item_quantity', $item['qty'], $item ); ?></td>

			<!--NEW COLUMN-->
			<td class="td" style="text-align:left; vertical-align:middle; border: 1px solid #eee; font-family: 'Helvetica Neue', Helvetica, Roboto, Arial, sans-serif;">
    		<?php
			
			if ( ! $short_description || $_product->is_type('variation')) {
				
					$_product = wc_get_product( $item->get_product_id() );
				
				echo wp_kses_post( apply_filters( 'woocommerce-product-details__short-description', $_product->get_short_description(), $cart_item, $cart_item_key ) . '&nbsp;' );
				} 
				else {
					
			echo wp_kses_post( apply_filters( 'woocommerce-product-details__short-description', sprintf('woocommerce-product-details__short-description', esc_url ( $short_description ), $_product->get_short_description()), $cart_item, $cart_item_key ) );

			};

    		?>	
			</td>
			<!--END NEW COLUMN-->

			<td class="td" style="text-align:left; vertical-align:middle; border: 1px solid #eee; font-family: 'Helvetica Neue', Helvetica, Roboto, Arial, sans-serif;"><?php echo $order->get_formatted_line_subtotal( $item ); ?></td>
		</tr>
		<?php
	}

	if ( $show_purchase_note && is_object( $_product ) && ( $purchase_note = get_post_meta( $_product->id, '_purchase_note', true ) ) ) : ?>
		<tr>
			<td colspan="3" style="text-align:left; vertical-align:middle; border: 1px solid #eee; font-family: 'Helvetica Neue', Helvetica, Roboto, Arial, sans-serif;"><?php echo wpautop( do_shortcode( wp_kses_post( $purchase_note ) ) ); ?></td>
		</tr>
	<?php endif; ?>

<?php endforeach; ?>

<?php
/**
 * Order details table shown in emails.
 *
 * This template can be overridden by copying it to yourtheme/woocommerce/emails/email-order-details.php.
 *
 * HOWEVER, on occasion WooCommerce will need to update template files and you
 * (the theme developer) will need to copy the new files to your theme to
 * maintain compatibility. We try to do this as little as possible, but it does
 * happen. When this occurs the version of the template file will be bumped and
 * the readme will list any important changes.
 *
 * @see 	    https://docs.woocommerce.com/document/template-structure/
 * @author 		WooThemes
 * @package 	WooCommerce/Templates/Emails
 * @version     2.5.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

do_action( 'woocommerce_email_before_order_table', $order, $sent_to_admin, $plain_text, $email ); ?>

<?php if ( ! $sent_to_admin ) : ?>
	<h2><?php printf( __( 'Order #%s', 'woocommerce' ), $order->get_order_number() ); ?></h2>
<?php else : ?>
	<h2><a class="link" href="<?php echo esc_url( admin_url( 'post.php?post=' . $order->id . '&action=edit' ) ); ?>"><?php printf( __( 'Order #%s', 'woocommerce'), $order->get_order_number() ); ?></a> (<?php printf( '<time datetime="%s">%s</time>', date_i18n( 'c', strtotime( $order->order_date ) ), date_i18n( wc_date_format(), strtotime( $order->order_date ) ) ); ?>)</h2>
<?php endif; ?>

<table class="td" cellspacing="0" cellpadding="6" style="width: 100%; font-family: 'Helvetica Neue', Helvetica, Roboto, Arial, sans-serif;" border="1">
	<thead>
		<tr>
			<th class="td" scope="col" style="text-align:left;"><?php _e( 'Product', 'woocommerce' ); ?></th>
			<th class="td" scope="col" style="text-align:left;"><?php _e( 'Quantity', 'woocommerce' ); ?></th>
						<!--MIO--><th class="td" scope="col" style="text-align:center;"><?php _e( 'UOM', 'woocommerce' ); ?></th><!--END MIO-->
			<th class="td" scope="col" style="text-align:left;"><?php _e( 'Price', 'woocommerce' ); ?></th>
		</tr>
	</thead>
	<tbody>
		<?php echo $order->email_order_items_table( array(
			'show_sku'      => $sent_to_admin,
			'show_image'    => false,
			'image_size'    => array( 32, 32 ),
			'plain_text'    => $plain_text,
			'sent_to_admin' => $sent_to_admin
		) ); ?>
	</tbody>
	<tfoot>
		<?php
			if ( $totals = $order->get_order_item_totals() ) {
				$i = 0;
				foreach ( $totals as $total ) {
					$i++;
					?><tr>
						<th class="td" scope="row" colspan="3" style="text-align:left; <?php if ( $i === 1 ) echo 'border-top-width: 4px;'; ?>"><?php echo $total['label']; ?></th>
						<td class="td" style="text-align:left; <?php if ( $i === 1 ) echo 'border-top-width: 4px;'; ?>"><?php echo $total['value']; ?></td>
					</tr><?php
				}
			}
		?>
	</tfoot>
</table>

<?php do_action( 'woocommerce_email_after_order_table', $order, $sent_to_admin, $plain_text, $email ); ?>