FINT run creating 2 interest invoices

Hello All,

Until sept 2013 FINT run use to create just one interest invoice per month but from Nov 2013 till Aug 2014 it started creating 2 separate interest invoices with same document type. Again from Sept 2014 onwards it creates just one interest invoice per month but that invoice does not include all interest receivable and includes only rental interest.

The questions are -

1) Why system started creating 2 invoices from Oct 2013? Does anyone know configuration change that could have affected?

2) Should FINT run normally create one interest invoice for all open items?

Appreciate your kind response.......

Thanks & Regards