Payables Accounting Process Date Question

 apps 11.5.10.2

Invoice was entered in November with distribution GL date in November.  Now, while November was still open, and before the invoice had been accounted,  the invoice was cancelled in December which gave the distribution lines for the cancellation a date in December.  Then, the Payables Account Process was run with a through date of 11/30.  The report for the accounting process picked up both the distribution (Nov date) and the cancellation (Dec date). 

I am thinking that the accounting process picks up the distribution date of the first invoice line and uses that if the invoice has conflicting dates on different lines and marks the invoice as accounted.  I am just looking for confirmation that this is the case.