Hope you did well in Prelims.
Regarding this so called 'Unofficial' 'Leaked' 'Secret' Syllabus, there was a rumor that UPSC 'updated' syllabus and this 'new' syllabus was circulated sometime last year.
It is also said that few questions came from this syllabus.
Though there is no 'Official' update about this, its better to have a look at these new Topics and Judge for yourself.
I am merely copy pasting the speculated syllabus here, from previous discussions:http://discuss.forumias.com/discussion/4120/civilised-speculation-redux-upsc-cse-pattern-change-2014/p19
Check it and do post if there are any updates/modifications..