Anytime I kill something, its battler stays on the screen, and it does die, but it doesn't dissapear. The sound effect doesn't even play. I've tried removing all of my scripts, but it didn't help.
make sure that NONE of the enemies have any states applied to them when they die other than the standard death one. It's a bug VX has. There's been a fix for it via Yanfly's scripts. I don't have time to find the Wiki with Yanfly's scripts atm, but look it up and look for the bug fixes, it's called "enemies reappearing fix" or something similar.
If that doesn't work then I have no other ideas.
Yeah, make sure that the incapacitated state removes all other states.
Turns out the problem was that I had nothing for the game to say when an enemy fell into the state. Thanks guys!