That's right, the memo will not be displayed after todays date is 15.09.2015, but before that date it will be reflected on the Cashflow.
Look at those memos with date 14.08.2015, they were created yesterday with value date an expire date in the past, but in FF7A they are not shown. However they will be in FF6A as a record until I convert it (delete).
Kind Regards