When sending Landed cost from Accounts Payable to inventory the transactions get the accounting date

The landed cost can fall in a closed period and updating the accounting date on all the rows can be cumbersome.  In addition, we have our Journal Date on the Journal Generator Template set to "Accounting Date on the Transaction" with an Alternate Journal Date of "Begin Date - From Period".  However, the transactions with a transaction date in a closed period are not picked up and posted to the 1st day of the Open Period.  Why is this?