Multisite - Subdomains redirecting to main site from Subdomain admin panel

So, I have multiple issues.

We are currently developing a Multisite framework. I'm on my 3rd WP install and setup with the same persistent issues. Each time the DB has been blown away and setup fresh.

No plugins have been installed, no themes other than the default have been used.

1. I am unable to preview drafts on the main site. I receive the error "Sorry, you are not allowed to preview drafts."

2. When I select "Visit Site" from anywhere within the Network, main site or subdomain admin panels I'm redirected to a logged out version of my site.