I don't really know why they did that,i completed SHS in 2005 and sat for for private exams and had admission my education certificate was genuine which I have used to school @ nursing school and I collected the original certificate from west Africa examination council when I was preparing for the interview and checked on their website to match with my grades..I added my nursing documents to the form and my work place,which is one of the teaching hospitals in Ghana and looking @ my face,she thought I was using somebody's document(my thinking),the security @ the embassy gate asked me same question when I was entering and I gave CO the corrects answer on hep B to tell them I didn't sleep ap school and that was my first ever visa application...even @ work place some people don't believe my age but they always says my thinking tells them am old haha and I enjoy that