Service Contract Billing Streams not Updating with API.

There is requirement in Oracle Service Contract  program to split up the billing schedules stream levels using contracts api. Since we have irregular period start dates and end dates on contracts we need to generate first billing stream level partial for the first month and second billing stream level should be for the full month. 

For e.g. – Line start date 10-DEC-2014   and line end date – 31-MAR-2015

Then stream level should be generated like below

Stream 1   10-DEC-2014 31-DEC-2014

Stream 2   01-JAN-2015 31-MAR-2015

Currently to achieve this we are using “oks_contracts_pub.create_bill_schedule” api and calling the api twice.