When you complete a paid session, Tinrate generates a self-billed invoice on your behalf. This is a standard practice where the platform issues the invoice for you, so you don't have to.
Because Tinrate issues this document, the bank details (IBAN) shown on it are Tinrate's, not yours. That's expected, and it does not mean your payout is going to the wrong account.
Your own payout details are the ones you've set on your Billing page.