Parent teacher conference

This is the first time I have ever gone to a parent teacher conference , and every teacher spoke so highly about my child. Then the grades!!!we stood baffled together. The charming, pleasant, polite student who use to get in trouble allllllllll the time and according to him they just didn't like him. How can the social butterfly have the grades of a ookie kabookie !!!! I didn't even know how
To handle this, do I hug him than yell? Or slap him in the head and then kiss him on the cheek? Well I smiled , yelled and kissed him on the cheek lol. My boys keep me crazy in love with them...