ADP SOR's Rolling to RO's

Our GM Dealership uses ADP's SOR system, including the 'auto-roll' feature.
Our problem is that customers may require parts on order, and alternate transportation as well. RO's are pre-invoiced, and left open for a day - until the closed rental agreement for alt/trans arrives from the rental company.
In the meantime, the customer has taken their vehicle back, and when we re-open the RO to finalize the rental charges, the parts ordered [which have come in overnight] now roll to the RO!
We don't want the parts on that RO, as we do need to close the first one out.
The auto-roll works so well on the other parts [both back counter and wholesale invoices] that we really don't want to make extra work by turning it off.
Any suggestions on the process or ADP setting would be greatly appreciated.
Our problem is that customers may require parts on order, and alternate transportation as well. RO's are pre-invoiced, and left open for a day - until the closed rental agreement for alt/trans arrives from the rental company.
In the meantime, the customer has taken their vehicle back, and when we re-open the RO to finalize the rental charges, the parts ordered [which have come in overnight] now roll to the RO!
We don't want the parts on that RO, as we do need to close the first one out.
The auto-roll works so well on the other parts [both back counter and wholesale invoices] that we really don't want to make extra work by turning it off.
Any suggestions on the process or ADP setting would be greatly appreciated.