B.Ed from IGNOU before appointment

I’ve been selected as an assistant teacher (Bio pass) through 12 th RLST of WBCSSC. I had joined my school on December 2013. I had obtained my B.Ed degree through IGNOU(I used to work few years back in a private ICSE school which has permitted me to pursue IGNOU B.Ed) on February 2012 but could not attach the B.Ed degree in the 12th RLST application form due non publishment of result. Naturally my SSC recommendation letter does not have the B.Ed degree on it and also not on D.I’s approval.Please can you tell me, what is the procedure and how can I add this degree in my qualification as well as service book ? As I’ve completed my B.Ed degree much before joining the said post so there arise no question of obtaining D.I.’s permission. Please tell me whether I can obtain incremental benefits through the above said degree or I’ve to obtain B.Ed degree again(that is impossible as per rule same degree cannot be obtained twice)