From the details you have provided, it is not clear whether you have received your training closure/confirmation letter or not. It is possible that your Special Performance Appraisal Report (SPAR) for the last six months, which was necessary to conclude your probation/training period, has not yet reached the HR department along with other requisite documents such as Safety/Vigilance/Departmental Clearance (especially crucial in some industries for the production department). Once the HR Department receives your SPAR along with these reports (if necessary in your industry), they will issue the appropriate order in accordance with the terms of your appointment with retrospective effect. Please do not worry.
Good luck,
Regards,
AK Jain
HR Personnel
NCL, CIL