Does the IRS double debit taxes for e-filing if the 8453-OL form is sent in after they've already debited?

A friend of mine e-filed her tax return, and has to send in the 8453-OL signature form after the return is accepted and she gets a DCN. One of the things that form does is give the US Treasury authorization to debit a bank account for taxes owed. However, as soon as the return was accepted, the IRS already deducted the taxes from her bank account. Is there a danger that they will debit again once she sends the form in? Thanks.