There have been no transactions on your account. When using “Direct Payments,” the transactions will appear immediately in your PayPal or Stripe account when they happen.
As to why you saw a download, it’s highly unlikely it’s a glitch. It’s more likely that you potentially misconfigured your page for some time or forgot you gave access to the page in another way. itch.io has a wide range of access control options so you might want to review your account if you are unsure: https://itch.io/docs/creators/access-control