First of all, I'd say the primal diet is a reward - the prize! - itself. Don't look for the results to support ypour choices; look for and enjoy your health.
Anyway, 2 months is a short time. Our bodies are diferent, after all.
Second, is there really fat/weight to lose?
Third... if second point has a "yes" answer, it can be related with hormonal misregulation or stress/lack of sleep.