Dear Mr. Sudhir Singh, it appears there is some mistake in your pay office. Once you are a member of the Government Provident Fund (PF) in any organization, any subsequent employer must deduct and deposit the PF in that account. For further clarification, please go through the following act:
THE ALL INDIA SERVICES (PROVIDENT FUND) RULES, 1955
In exercise of the powers conferred by sub-section (1) of section 3 of the All India Services Act, 1951 (LXI of 1951), the Central Government, after consultation with the Governments of the States concerned, hereby makes the following rules, namely:
1. Short title: These rules may be called the All India Services (Provident Fund) Rules, 1955.
This act is available on the internet, and you can download it and provide it to your department, and they will rectify the mistake.
Regards