Congrats on the new mobile-responsive theme!
To get set up as you are describing, you would first need to click on your Teams tab and then click on Pages.
Once you have done that, click the Add New Page link:
Choose a GENERAL PAGE and name it Mites.
Once you have created that General page for Mites, you can then move all your Mites team pages under that new page. Just go to any of your Mites pages and click the Admin button, then click the Options link:
Click the Move Page link, then choose to move it under the new Mites page you have created.
Let me know if you have any questions.