I experienced these challenges myself recently. Hadn't noticed a charge vs my credit card for a pre-order of Rapido wagons but had no visibility of my pre-order being converted to an order until the stock was dispatched a few days later and I got an e-mail saying the order had been sent. That e-mail also referred to three items I had pre-orders which had not yet arrived from the manufacturer, so it could be a little confusing in figuring out what was sent and what wasn't.
A small improvement would be to include a link to the tracking information in that e-mail. Ideally, it would be great to see the pre-order 'transferred' to the list of fulfilled orders. Otherwise, there is no record of my order on the web site.