Second install page resets with email error

Never seen that happening. Try using a different browser.

Just wondering if your server meets the requirements:

http://wordpress.org/about/requirements/

I think this might be the same issue here:

http://wordpress.org/support/topic/error-you-must-provide-an-e-mail-address-fresh-installation-of-wp-312?replies=2

It says: Reset post_max_size to 12M and Bob’s your uncle. Which mean you have to edit the php.ini or ask your host, how to do that for you site.