There were a few scenarios that felt harder than they should have been, but I don't remember anything being impassable.
Dare I ask.... What story mode glitch are you talking about?
when youre listening to a dude & you have to record his convo. it keeps going to this weird out of body & a 100 yards above the map thing following a cut scene. --- I'm convinced the folks on the Call of Duty: Black Ops II boards are the world's dumbest.