Sales order having 3 lines shipped on 28/2 and rest 6 lines on 3/3. However the sales invoice was cr

Sales order having 3 lines shipped on 28/2 and rest 6 lines on 3/3. However the sales invoice was created for all the 9 lines and with invoice date 28/2. It did not split by Autoinvoice.

Auto invoice grouping rule is set for interface line attribute1, i. e., sales order only.

Batch source gl date in closed period is set so Default. 28-feb is last date of feb-17 and 3-mar is of Mar-17 period.

However the finance users have closed/opened the periods on date 3rd Mar.

Any possible reasons why it did not split in two invoices?

Regards

Bhavesh