When the front office is not able to take attendance, consider the Homeroom.
All middle schools are considered daily attendance so their "homeroom" section always needs to be assigned to their homeroom period. In WMS's case, it is 9th period. Changed the period to 9th to be able to take attendance. The other schools are as follows:
All WCS High Schools - 1st DMS - 10th EBSMS - 1st GSMS - 10th WMS - 9th
Also, ensure the student's classes at WMS are dropped before adding new classes. We cannot keep students doubly enrolled as it will cause multiple issues with historical grades, reporting, and other areas.