Eway transactions are a lot like Paypal. The transaction payment tender is taken from the customer account and logged in eway clearing account. The appropriate payments can then be transfered from the eway clearing account to your bank account.
The name of the tender should be “Eway”. The source field on the tenter type has to have a value of “Web”. Readysell can help set up the Tender. If you have other tenders set up that are a type of Card, you need to remove the Soure field of 'Web' off these tenders.
See, Tenders
You do not want other transaction types other than SALWEB using the Eway tender as this is specifically used by web orders only.
See, Setting up tenders to be restricted to certain transaction types
See also:
Reversing a payment made on a sales order with a prepayment
Handling of Sales Orders/Laybys/Eway with a deposits and payments against sale orders
Cancelling a sale order and/or Prepaid Order