foreman not terminating process

gistfile1.txt

$ cat Procfile
web: rails server thin -p $PORT
$ gem list | grep foreman
foreman (0.19.0)
$ ps aux | grep thin
kmamykin 13773  0.0  0.0   4156   864 pts/2    S+   14:22   0:00 grep thin
$ foreman start
14:22:36 web.1     | started with pid 13897
14:22:50 web.1     | => Booting Thin
14:22:50 web.1     | => Rails 3.1.0.rc4 application starting in development on http://0.0.0.0:5000
14:22:50 web.1     | => Call with -d to detach
14:22:50 web.1     | => Ctrl-C to shutdown server
14:22:58 web.1     | >> Thin web server (v1.2.11 codename Bat-Shit Crazy)
14:22:58 web.1     | >> Maximum connections set to 1024
14:22:58 web.1     | >> Listening on 0.0.0.0:5000, CTRL+C to stop
^CSIGINT received
14:23:24 system    | sending SIGTERM to all processes
14:23:27 system    | sending SIGKILL to all processes
14:23:27 web.1     | process terminated
14:23:27 system    | sending SIGTERM to all processes
$ ps aux | grep thin
kmamykin 13903 38.0  2.0  68620 61836 ?        Sl   14:22   0:22 /home/kmamykin/.rvm/rubies/ruby-1.9.2-p180/bin/ruby script/rails server thin -p 5000
kmamykin 15466  0.0  0.0   4156   868 pts/2    S+   14:23   0:00 grep thin