Finally had the chance and just offering backup confirmation.

In order to update the prior date create in the recurring list you need to create the invoice template.  Then, you go to the customer record and open the invoice that was created and edit it and then review and send.  Once this is completed if you go back to the recurring list the prior date is now updated.

This is completely inefficient.  But, it's a workaround.  Hoping they get it figured out.