This could happen if learners were enrolled to these Functional skills programmes earlier, and Aims did appear in the ILR when they were enrolled the first time, but later these FS aims were deleted manually. 

Please be advised that as per our functionality, if aims are deleted from the ILR, then these aims will not appear in ILR on further re-enrolment of the learner to the same programme. In such cases, aims need to be added manually.