Why has my Employee ID numbers changed?

It sounds like the employee ID numbers have been manually changed by someone on the staff. If this is the case, you'll need to manually adjust the IDs again and make sure they are incremented properly from there. It's important to ensure consistency and accuracy in the employee ID system to avoid any confusion or errors in the future. If there are specific procedures or protocols in place for managing employee IDs, it might be a good idea to review and reinforce them to prevent similar issues from occurring again.