Problems with virtual hosts configuration on apache2 ubuntu 14.04

Hi - I have various subdomains set up successfully as virtual hosts on my Digital Ocean Droplet. For some reason though, my latest subdomain is redirecting to a different subdomain, and I’m not sure why. So if you go to selingo.mikeheavers.com it shows the site for exhibitcolumbus.mikeheavers.com. Furthermore, if you just enter my droplet’s IP address (http://107.170.120.88/), it serves exhibitcolumbus.mikeheavers.com - I would expect it to just serve mikeheavers.com. What have I mixed up?

This is the contents of sites-enabled/selingo.com.conf:

<VirtualHost *:80>
        <Directory /var/www/html>
                Options Indexes FollowSymLinks MultiViews
                AllowOverride All
                Order allow,deny
                allow from all
        </Directory>

        ServerAdmin mheavers@gmail.com
        ServerName selingo.mikeheavers.com
        ServerAlias www.selingo.mikeheavers.com
        DocumentRoot /var/www/selingo/public_html

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined
        LogLevel warn rewrite:trace8

        RewriteEngine On
        RewriteCond %{SERVER_NAME} =selingo.mikeheavers.com
        RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,QSA,R=permanent]
</VirtualHost>

and this is the contents of exhibitcolumbus.mikeheavers.com.conf:

<VirtualHost *:80>
        <Directory /var/www/html>
                Options Indexes FollowSymLinks MultiViews
                AllowOverride All
                Order allow,deny
                allow from all
        </Directory>

        #ServerName www.example.com
        ServerName exhibitcolumbus.mikeheavers.com
        ServerAlias www.exhibitcolumbus.mikeheavers.com
        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/exhibitcolumbus/public_html

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined
        LogLevel warn rewrite:trace8

RewriteEngine on
RewriteCond %{SERVER_NAME} =exhibitcolumbus.mikeheavers.com
RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,NE,R=permanent]
</VirtualHost>

For both vhosts, I did a sudo a2ensite for the .conf file. I also logged into my control panel and created an ‘a’ record for each subdomain pointing to my IP for the droplet.

I noticed this in /etc/hosts:

127.0.1.1 extra extra
127.0.0.1 localhost
~

I’m not exactly sure what the top one does. I don’t remember setting that up.

Anyone have an idea of where I’ve gone wrong or how to fix / investigate?