Revers Supplier Invocie item

Hi Colleagues,

Anybody Can help me to better understand my case i have three  items attached on the project  in the invoice distributions (Oracle Payable )as following:

Item: XX

Quantity: 1

Price: 10

After reversing the above item:

Item: XX

Quantity: -1

Price: 10

After reversing the item one more time :

Item: XX

Quantity: 1

Price: 10

Now the question is when I have been through project costing (Expenditure inquiry  Workbench ) and inquiry for supplier invoice attached on that project . It shows two items   with a positive quantity and it doesn’t shows the reversed one .

 

The current release 11.5.9

Project costing,

There is no supplier cost interface exception for that project,