After you place your bid you will be taken to a page confirming your bid amount and verifying the bid was registered. You will also receive an email confirmation within a few minutes after placing the bid to verify the bid is live.

If you have not received the email verification of the bid you may go back to the auction and make another bid. If the system has a previous bid from you it will prompt you to "edit" your bid.

If you are not prompted to edit your bid then your first bid was not registered and you should place the bid again.