Is there a maximum number of 25 valid grades allowable to Enforce Valid Grades?

Summary:

When activating the valid grades Profile Options (PER_ENFORCE_VALID_GRADES and PER_DEFAULT_GRADE_FROM_JOB_POSITION), the dropdowns only display 25 Grades. Many of our job codes have more than 25 valid grades, so the dropdowns don't display the entire list. Is this expected behavior of the profile options?

Version: 23D