I've been trying to get into Sniper Elite, and I'm on the Assassination mission (part 3). I've noticed up to this point, the enemy isn't TOO keenly aware of my presence, but this part has really gotten to me. I've managed to sneak past the guards and collect the new rifle, but then completing the sub-objectives has been a massive pain. I've been able to take out one guard with my pistol after luring him with a rock, but sneaking around the barricade to plant TNT near the wine cellar has been a thorn in my side.

I HAVE to be going at the slowest possible crawl or the enemy will hear me (slow crawl with SHIFT being held). Even the slightest jangle of my tools sets the nearest guard off. Is their hearing supposed to be THAT good, or is the game bugged? I've noticed moving is like being on an ice rink as well, but I know for sure that's a bug.