Why it is different in both these places.
I am also not sure how to correct it.
getting a revised passport is tough...but getting a new SSLC certificate might be easier..
check with your school and see how to get a new one.....yu can say that you lost your SSLC marksheet and file a case in police station...get the FIR copy and apply for a new SSLC mark sheet....also while applying request for date of birth correction.....you might need to pay unofficial charges to get this done sometimes.....
Hope this helps