Unable to Update Invoice Amounts after Running Create Accounting in DRAFT

Qn1:

Invoice Amount field is available for update before "Draft Accounting" but is “greyed out” after running:
Invoice Workbench form>Invoice>Actions>Run Draft Accounting.
Is this the correct functionality?

An1:

The correct functionality is to be able to adjust adjust accounting entries in Payables after the Create Accounting program is run in Draft mode.
To adjust accounting entries, adjust the transaction details and rerun the Create Accounting program.
See more details in the Oracle Payables User Guide.

Qn2:

For non-matched invoices, the invoice distributions appear to be update-able after Draft accounting.
Is it correct, that you update first the invoice distributions and then invoice line?
The invoice header amount can then be updated?

An2:

First, the amount in invoice distributions must be modified (in fact this is the information that will go into accounting entries)
and right after correct the lines or invoice header amounts.

Qn3:

For matched invoices, nothing appears to be update-able after Draft accounting has been run.
Is this correct?


An3:

Since the invoice is matched, distributions of the invoice contain PO information that cannot be changed in this way.
(the matched lines must be discarded to be able to change/modify the amounts)