Friend, i think you are too much confused abt SCDL.. have u checked up SCDL website or not. SCDL did not have any office bearing their logo in any other cities other than Pune, which is their main branch...... regarding the Kalyannagar authorised center, as mentioned by amit in his thread, it is meant for only conducting the exams...normally these SCDL exams are conducted in computer training institutes / consultancies ONLINE.
pse visit the scdl site and download their prospectus and read it