Oracle Order Management offers a very interesting functionality of defaulting rules that default lot of values values while entering the sales orders, like default of shipping/payments etc information on order lines from order header. Very common mistake that business user made is, they define the defaulting rule, but forget to generate the defaulting rules.
When ever we update or create a defaulting rule, please Navigate to - Tools - generate the defaulting rule. This will submit the defaulting rule generation concurrent program.
In case you have updated lot of defaulting rules, and don't want to generate the defaulting rule in above manner for each and every change, in that case after making all the changes, just submitted the defaulting rules generation concurrent program.