It is possible that the procedure action is 'Send reminder 1' and that you've send a reminder 1 (Debtor sheet - Send document overview), but the procedure step has not yet been performed.
There are two ways to send a reminder.
You follow the procedure and execute the action offered in the automatic worksheet list
- On demand
You send the document via Send document overview on the debtor sheet
Only the first option (execution via the worksheet) is recognized for the procedure step being executed.
Sending a reminder on demand is only used to resend an account statement/reminder when asked by the customer.