What did you do to measure your body fat %.  Unless you got it tested with calipers by someone very experienced with using them, you probably got a misread.  If you used electronic devices that send pulses through your body, they are as reliable as shit.  I am ~12-13%, but those devices said I was 5% LOLLL.  Even if you used calipers, there is room for error.
Vag, maybe he has a small head and short neck, and his shoulders are at a much higher starting point than yours? LOLLL