When adding a pay type to an employee record, the pay type may have specific restriction filters setup that would prevent that pay type from being added to an employee in a specific position.
1. In Configuration > Pay types > open the pay type in question 2. Select the restrictions tab 3. Select the filter for position 4. Add the employee's position if it should be there 5. Save and close the pay type 6. Attempt to add the pay type again to the employee