Issue on "Recruiting Candidate" Type at Position Incumbent section

Summary:

At Position, we have not enabled override but we see that when a internal employee applies for a job and is linked to a position at recruitment, even if the Position does not have vacant FTE, they are still linked to the Position and vacant FTE becomes negative. The status at Position is shown as "Recruiting Candidate"

Content (please ensure you mask any confidential information):

We have some internal employees who have applied for a Job requisition(created from a Position) and have been selected. They are shown at Position as Type "Recruiting Candidate" at the Incumbents section. How to change such person's Type and why the even if the position is not having vacant FTE, the candidates is still assigned to the Position?