Late Charges and Late Charge Batch overwritten ?

In a certain Org, For a customer with Invoice due 06-Feb-2017, I ran late charges twice in draft mode, without generating in final mode :

             Gl_date                           Late Charge Date                        Late Charge created in Draft                         Late Charge Batch

1.        20-Feb-17                          20-Feb-17                                    $.31                                                         Batch 14026 20-Feb-2017

2.        6-Mar-17                            6-Mar-17                                       $.61                                                        Batch 14027 06-Mar-2017

Both times, the Late Charge generated was correct.

After Run #1,  as  Receivables responsibility:, Late Charges > Batch Maintenance,  Batch 14026 20-Feb-2017 came us just fine as Draft Ready, and the underlying tables ar_interest_batches_all,  ar_interest_headers_all, and ar_interest_lines_all had the correct data for the batch.

After Run #2, in the Batch maintenance form,  only the second batch : Batch 14027 06-Mar-2017 came up, the first Batch disappeared from the form and is no longer in the underlying tables. ar_interest_batches_all,  ar_interest_headers_all, and ar_interest_lines_all only have data for the second batch.