Dear Ms. Katie
I believe what you are looking for is not doable under the "Past Due Customer" Smart list. This smart list shows a single record containing a summation of all the due transactions for a certain customer under different categories (0-30 ; 31-60 ; 61-90 ... etc)
This means that the first category (0-30); for instance , may have several due documents, some of them may be 2 days, 5 days, 10 days, or 20 days past due. As illustrated below;
On the (Past Due Customers) Smart List, you might see the following record;
Customer_ID 0-30 Days 31-60 Days 61-90 Days 91 and Over Days
EFC0001 150 300 0 0
The amount (150) might be a summation of three Invoices, with difference "past due days" as follows;
Customer_ID Document_Date Due_Date Current_Date Due_Days Amount
EFC0001 01/04/2013 31/05/2013 24/06/2013 24 50
EFC0001 01/04/2013 15/06/2013 24/06/2013 9 50
EFC0001 01/04/2013 20/06/2013 24/06/2013 4 50
Therefore, I suggest that you build your own customized "view" that has categories customized to your business need. For example, you can add new categories instead of (0-30) such as (0-10; 11-15; 16-30) The main idea is that you need to consider the difference in (days) between the document due data and the current date.
I would like to refer to a script made by Ms. Victoria Yudin "SQL view for current Receivables aging detail in Dynamics GP". You can simply modify the script to add new columns as illustrated above
Best Regards,
Mahmoud AlSaadi