The Seniority Date can become confusing since Seniority Date is used in Union Employee Maintenance and Attendance Maintenance. Please change in Human Resources Preferences to be Update ATTENDANCE Seniority Date with Adjusted Hire Date. On the Employee Attendance Maintenance window, please change Seniority Date to read ATTENDANCE Seniority Date. Could be a better idea out there but I have found that this gets confusing when adjusting either length of service or rehires when it comes to the length of service or benefits dates.