php bin/magento config:set system/security/max_session_size_admin 0

$transactionId = $order->getPayment()->getLastTransId();

<?php $_items = $this->getItemsCollection() ?>
    <?php $i=0;foreach ($_items as $_item):?>
        <?php if ($_item->getParentItem()) continue; else $i++;?>
        <tbody class="<?php echo $i%2?'even':'odd' ?>">
            <?php echo $this->getItemHtml($_item) ?>
            <?php echo $this->getItemExtraInfoHtml($_item) ?>
        </tbody>
    <?php endforeach; ?>

with

<?php $_items = $this->getItemsCollection() ?>
    <?php $_sortedItems = array(); ?>
    <?php foreach ($_items as $_item) : ?>
        <?php $_sortedItems[$_item->getSku()] = $_item;?>
    <?php endforeach;?>
    <?php ksort($_sortedItems); // This is where the sorting by SKU takes place ?>
    <?php $i=0;foreach ($_sortedItems as $_item):?>
        <?php if ($_item->getParentItem()) continue; else $i++;?>
        <tbody class="<?php echo $i%2?'even':'odd' ?>">
            <?php echo $this->getItemHtml($_item) ?>
            <?php echo $this->getItemExtraInfoHtml($_item) ?>
        </tbody>
    <?php endforeach; ?>

Done. If you open the detail page of an order with 2+ items, they should be sorted by SKU.

$quote = Mage::getModel('sales/quote')->setStoreId(Mage::app()->getStore('default')->getId());
$quote->setCustomerEmail($mail);
$product = Mage::getModel('catalog/product')->load($productId);
$buyInfo = array(
                    'qty' => 1,
                     'options' => array($optionId => $optionValue)
                );
$quote->addProduct($product, new Varien_Object($buyInfo));
         
$addressData = array(
                'firstname' => $firstName,
                'lastname' => $lastName,
                'street' => $street,
                'city' => $city,
                'postcode' => $postCode,
                'telephone' => '-',
                'country_id' => $country,
                'region_id' => $regionId, 
        );
         
$billingAddress = $quote->getBillingAddress()->addData($addressData);
$shippingAddress = $quote->getShippingAddress()->addData($addressData);
$shippingAddress->setCollectShippingRates(true)->collectShippingRates()
                        ->setShippingMethod('flatrate_flatrate')
                        ->setPaymentMethod('bankpayment');
         
$quote->getPayment()->importData(array('method' => 'bankpayment'));
$quote->collectTotals()->save();
         
$service = Mage::getModel('sales/service_quote', $quote);
$service->submitAll();

$order = $service->getOrder();
// ...

/* 9 = attribute set Id */
select
	increment_id,
	created_at,
	entity_id 
from
	sales_flat_order 
where
	entity_id not in (
		SELECT
			o.entity_id      
		FROM
			sales_flat_order o      
		LEFT JOIN
			sales_flat_order_item i        
				ON o.entity_id = i.order_id      
		LEFT JOIN
			catalog_product_entity p        
				ON i.product_id = p.entity_id      
		WHERE
			p.attribute_set_id = 9
	)

$trackingCollection = $order->getTracksCollection();
$firstItem = $trackingCollection->getFirstItem();
$trackingNumber = $firstItem->getNumber();
...

$order = Mage::getModel('sales/order')->loadByIncrementId($this->getOrderId());
$date = $order->getCreatedAtStoreDate();
// ...

$order = Mage::getModel('sales/order')->loadByIncrementId($this->getOrderId());
$items = $order->getAllItems();
foreach($items as $item) {
    //...                   
}

$address = $order->getShippingAddress();