Wait, "enemy despawn"? The fuck is that?
Most enemies in the game despawn after 10 kills. You can get around it by using an item at a bonfire, or so I've been told.
EDIT: Beaten and apparently wrong (about the number). I've never despawned a uh, spawn before but 15 sounds okay-ish. I wish it was that and they reset after you lose a soul'd bloodstain, had tiered soul counts based on number of times killed, etc. The way it is now just seems so bleh =\
Just because the demo stations ran on PS3 well enough, does not mean the whole game ran at an acceptable framerate.
That's probably why they cut it.
The problem is in them keeping the false promotional material, in my opinion.

It's nice to see someone come in here and not just damage control their ass off for this...