Home page rendering different than all other nodes

I'm creating a subtheme and have changed the way the postscript region displays.

I want postscript_first to be 12 columns wide and no zone for postscript_second, third, fourth. Each of those three are set to not display in any zone.

When I go to my homepage (http://localhost) I still see postscript_first, postscript_second, postscript_third, and postscript_fourth but when I navigate to any other page in my site (including http://localhost/?q=home) the page is rendered correctly and only postscript_first displays and it is 12 columns wide.

I have cleared my cache multiple times and restarted the server. I also deployed my subtheme to a different server and it is behaving exactly the same.

Any ideas what I'm doing wrong? Is there a special way to get this to work on the front page?