Unable to add students, who are past or current staff, as students to Activities and Teams

We have students who work during the summer. At the end of summer, we withdraw their Employment, which adds the “Past Non-Teaching Staff” role. Even after this, when we add them to an activity, they get promoted to “Leader”. When we add them to a team, they are promoted to “Coach” - and we have no way to convert them back to Student in the roster.

I have a list set up to find students who are currently employed, and have no records.

When we added students with Past Non-Teaching Staff or Past Seasonal/Temporary/Sub roles, even when we add them through the “+Students” field, get added as Leaders/Coaches.

We have to purge their work history, which affects our employee reports.