Duplicate folders in Mail app

Before I decided to format in order to clean install Snow Leopard, my Mail app was set up perfectly.

http://i50.tinypic.com/2ikw32u.png

Now that I set it up again, I have that 'Gmail' section underneath Inbox, and sent. I never had that before formatting. I don't know if maybe it's something I checked in the options.

http://i48.tinypic.com/2mdp9mv.png
http://i47.tinypic.com/xp935z.png
http://i50.tinypic.com/30aqkwj.png

There are the settings I have.

http://i47.tinypic.com/akvhvt.png

That's really all I want to get rid of.

I've done a lot of searching, but nothing seems to work. I hope it's something as simple as unchecking a certain box. Thanks in advance.

Edit: Oh, and how do I enable 'Trash' to show up underneath the Inbox and Sent folders?