“There doesn’t seem to be a wp-config.php file.” despite wp-config.php in root

Looks like you have 2 WordPress installations. One for the main site, other for the Blog.

http://parlourdc.com/wp-content/plugins/akismet/readme.txt

http://parlourdc.com/blog/wp-content/plugins/akismet/readme.txt

If that’s not on purpose, you have a blog folder in your site root that should be renamed/deleted as it contains a blank WordPress.

If you made a page on your main site titled Blog (and with blog slug), then change its slug and see what happens.