Default Apache page shows up on localhost:80 even after "stopping" apache2 service

Default Apache page shows up on localhost:80 even after "stopping" apache2
service

I'm running apache2 on Ubuntu 12.10. When I use the command "service
apache2 status" and it reports that apache is NOT running, the apache
default web page continues to run on port 80 for some reason. In my
sites-available folder, I have a python-based app which is assigned to
port 80, but when I reload & restart the Apache2 service and type
localhost in the browser it continues to run the default page.
How can I get rid of whatever apache2 is running on port 80?