The first one, while Defense must be boxing out the crease better that is still a horrible rebound. This is one my pet peeves, use YOUR STICK, he can go down with his pad out like that, with the stick in front of the pad. The puck ramps up and to the corner. Modern b-fly goalies lack good stick work like that in many cases. In this case, I think that Vokoun is actually trying to use his stick but just flat out missed it.
Goal 2 is tough but it is indicative of when a goalie doesn't fully trust his defense.
Notice (and he did this a few other times) that TK is more square to the slot area then the shooter. rather then turning his body and sealing the post paddle down or one pad up/one down. He is worried about a pass. Since his pads are pretty much on the goal line it lets the player walk through the crease. where if you form a wall a little more square to the shooter their only option is to pass really. I won't really blame Vokoun on this. Look at Tyler Kennedy in this. He doesn't stop at the top of the crease and prevent his guy from going over and having an easy goal. So I guess Vokoun was justified in worrying that no one would stop that guy crashing into the crease

But this is a good example of a goalie not trusting his D and making life worse. If he seals that short side off the puck can't/shouldn't squirt through to where the guy crashing the crease can bang it in.
Goal 4. he really should have that. He was in position ahead of time, but he was not square to the shooter and the puck just goes through him. It was a D breakdown, it was a good chance. But TK read it and just screwed it up really, once again I dunno if subconciously he is thinking there is a chance that the puck is being passed to the mid/high slot and that's why he is square in that direction.
5th one, he should have had at least "SOME" backward momentum going so that he wasn't down, stationary outside his crease. While it was a breakdown on D to let the player in all alone like that, Vokoun did nothing to help his cause with how he played that.