Invoice with GL Date in MAR-16 but accounted in APR-16
We have an invoice that was created in the month of MAR-16, but the invoice was validated and accounted only towards the end of the APR-16 month.
The invoice has a GL date of 16-MAR-16, but never validated in March. I believe the invoice was swept forward to April during AP period close. But then the GL date should automatically change to April right? Instead the GL date remains the same as it is and the invoice is accounted in April. However the GL date at line level has been changed to 01-APR-2016.
Could someone enlighten me regarding the importance of GL_date at header, line and distribution level.