You're prompted to enter a payment method and the amount you'd like to fund initially during the Connect Card application process. That said, the initial payment is processed on the back end and not processed until the account is set up. If there are no funds when the payment is processed, the initial payment will fail, resulting in a discrepancy in the welcome email.
If the initial amount is processed correctly, you should be able to see that balance when you log in. You can still log in and manually fund the account if that fails.