Using multiple sales agreements for an item in Release Management

We are implementing Oracle Release Management and have question regarding how multiple sales agreement can be used to process sales orders based on the customer forecast.

We create Child Blanket sales agreement for each calendar month- e.g., Jan 1- Jan 31st, Feb 1 - Feb 28th, March 1st - March 31st and so on. Customer forecast has scheduled ship date as Monday, but we create sales orders with schedule ship date as Saturday date.

When we receive forecast for the month of Feb, with the date of Feb 29th and March 7th, the demand processor should consider Feb Sales agreement for creating the sales order for the month of Feb and March Sales agreement for creating the sales order for the month of March. How can we do that- as Release Management processing rules allows only one sales agreement to be entered at a time.