Mass Enrollment Issue

Our functional users are trying to use the Mass Enrollment process to enroll students in a new non-credit certificate program. Some of the students are already active in dual academic careers. When the enrollments for the non-credit career are posted by the Mass Enrollment process, those classes are tied to a career other than the non-credit career "NOCR". Example, non-credit course tied to the undergraduate career "UGRD" that the student is already in. Does anyone know if there is a limit within the COBOL Mass Enrollment program for enrollments tied to a career or is there some set up that