A method of processing data in connection with a security is provided. The security is collateralized by a plurality of home mortgage loans or by portions of the plurality of home mortgage loans. The method comprises generating payment projections regarding principal and interest payment projections for the plurality of home mortgage loans; determining that the payment projections have errors; and modifying loan characteristic data to eliminate errors in the loan characteristic data that cause errors in the payment projections. According to another embodiment, a method comprises receiving payment data regarding the plurality of loans a plurality of times separated by a plurality of days during the reporting cycle. Each time the payment data is received, the payment data is processed and the opportunity to make corrections is provided.