Screen and dtach sessions show as main in process manager

[koper89]

Hi,
Every time when I try to start my daemon
start-stop-daemon --chuid $USER --start --name $NAME --nicelevel $NICE --background --pidfile $PID_FILE --make-pidfile --exec /usr/bin/dtach -- -n $TMP /usr/local/bin/rtorrent -n -o import=$CONFIG_FILE

My pid file is showing process that don't exist and this process is showed in top as main. What can be a cause of this? I'm trying to make package for xbian but can't make proper stop script for this, and can't kill the process

Here's my current init.d file:
https://github.com/koper89/xbian-rtorrent/blob/master/content/etc/init.d/rtorrent

if you want to test my rtorrent package:
https://github.com/koper89/xbian-rtorrent