Rewrites misbehaving…

I have an installation where I am attempting to force non-ssl on all pages aside from wp-login.php, anything in wp-admin, and the contact form. The code I am using, which is above the WordPress rewrite, is as follows:

RewriteEngine On
RewriteCond %{HTTP_HOST} !^domain\.com$
RewriteRule ^(.*)$ http://domain.com/$1 [R=301,L]

RewriteCond %{SERVER_PORT} 443
RewriteCond %{REQUEST_URI} !^\/wp-admin\/.*$
RewriteCond %{REQUEST_URI} !^\/wp-login\.php$
RewriteCond %{REQUEST_URI} !^\/contact-me-page\/$
RewriteRule ^(.*)$ http://domain.com/$1 [R=301,L]

The results are:
Go to any page on the www version of the site, get redirected to non-www (expected).
Go to https on wp-login.php or any wp-admin/ page, do not get redirected (expected).
Go to https on any page aside from /contact-me-page/ get redirected to same page on non-https (expected).
Go to https on /contact-me-page/ get redirected to index.php on non-https (unexpected).

If I move the code below the WordPress rewrite block it gets ignored altogether. Anyone have any idea what might be going on here or how to fix it?

Thanks.

-Michael