problems with god of war 3

ive noticed that people are only putting the game on for a few seconds
then notice it playing and putting on the list that its working when it is wrong,
with god of war 3 when were far through the game the buttons play up and its slightly jumpy in places.
on one part where you have to hover over a air thing to make you fly up so you can get on to a platform it just keeps nocking you back down,
also when im on the part where you have to pull the leaver to turn the brigdes it plays up on there too,
just a heads up
i dont see the point in the list unless there was going to be a column for different probs for the games and actualy have the probs listed
like killzone 2 dont work for everyone also