On my Halo 4 Overview it says that I’ve completed 14/10 Spartan Ops missions, I haven’t even beat all of ep 2 yet. And under Top Medals it say I’ve gotten medals that I’ve never gotten (like a Unfrigginbelievable). But my stats are just fine.
For some reason spartan ops missions done solo and in co-op are counted as two different missions. Not sure about the medal problem.