Reversal of IPV Line

Scenario 1

We Created a PO for 100 and matched it to the invoice of 110. The 10 went to IPV.  Then we corrected the PO price to 110 and in the invoice the IPV line became 0 - this is OK

Scenario 1

We Created a PO for 100 and matched it to the invoice of 110. The 10 went to IPV and we accounted and transferred the lines to GL . Then we corrected the PO price to 110 but the invoice still had the 10 in the IPV it did not reverse it and post the reversal to the expense account  - is this correct???