Looking for confirmation that the memo line on a linked credit memo is always the memo line of the l

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We are using autoinvoice to create credit memo's and link them to the original invoice.

We have scenario's where the memo line on the credit memo is different from the invoice.  Based on all the testing we did it seems that the credit memo is always created with the memo line from the invoice even though we provided a different memo line in the autoinvoice FBDI file.

We found an Oracle eBusiness Suite note that claims this is intended functionality.

Autoinvoice : Does Profile Option AR: Use Invoice Accounting For Credit Memo Drive the Memo Line on the Interface Line for Credit Memos? (Doc ID 1643749.1)