In that sort of situation -- i.e., a genuinely automatic FG in an extremely short down/distance situation -- the only thing you should be playing is the fake. Don't waste effort trying block a chip shot. It's shorter than the old extra point, and they had something like a 99.5 percent success rate the year before they moved the ball back.
It shouldn't have surprised them because the only thing they should have been defending against was the fake. Don't try to block an old-school extra point. It never works.