If no fees were taken, then I suspect the first order was paid through an alternative payment method and not Shopify Payments. You can check this by opening the order and scrolling down to the order timeline to see which payment provider appears.
For example, if the order was processed through Paypal instead of Shopify Payments, then the funds would have been deposited into your Paypal account. You can see what payment providers you have enabled in your store by going to Settings/Payment Providers.