Ordering Approval Groups for AP Invoice Approval

Hi,

I have the following scenario.

There is a user called Carl. If Carl creates an invoice in Operating unit A,then it should go to Nigel. Then after Nigel approves it must go to Audit approval group(consisting of 5 auditors). If one of the auditors in this Audit approval group approves, then invoice must end approval process.

So I have created 2 approval groups.

1.Approval Group called Carl Approval group.(order number =1,voting method = serial with person Nimal assigned order number 1)

2.Audit Approval Group.(order number =3, voting method = First Responder wins with 2 auditors assigned with order number 2)

I have assigned a