EXP: 'Assign to Expense Auditor' list compiles with users without Expense Auditor role

Summary:

The screen 'Assign to Expense Auditor' compiles with a list of users that do not have any auditor roles assigned to them. Is there a specific setup/config that should be looked at where this list is derived from?

Content (required):

I have a list of Expense Auditors displayed in the pop-up below but only a few have the actual Expense Auditor role assigned.

Eg. one user (listed below) do not have the Expense Auditor role assigned. Is there another place where this assignment is done or information is kept?

Version (include the version you are using, if applicable):