This may be due to the payment method you have selected: If you choose PayPal Express as the payment method for your order, the address of the PayPal account will be used to create the order. If this address differs from your usual e-mail address, then these orders are also stored in a different customer account. The order confirmation and dispatch notification will also be sent to your PayPal email address.
The same applies to both Apple Pay and Google Pay.
If you cannot find your order with any of your email addresses, please contact our Customer Care Team.