Grouping profiles do not work

Hi, ALL,
R : 12.1
User guide said:

You can add need-by date or ship-to organization and location to the default
grouping by using the profiles PO: Use Need-by Date for Default Autocreate
grouping or PO: Use Ship-to  for Default Autocreate
grouping.

Scenario:

Both need by date and ship to location is the same,
set  PO: Use Need-by Date for Default Autocreate grouping = No
PO: Use Ship-to  for Default Autocreate grouping = No.


Shipping information still got  combined. What I want is shipping split and one distribution each.
Why these profiles did not work for grouping?


Thanks, Stefani