Unable to get subdomains working

I’m sure this is some stupid little thing I’m missing, so I’m reluctant to post, but I don’t want to waste any more of my evening on something I can’t solve.

On my server I want to setup a staging url which will host beta features before we push them live. However, despite putting in an A record and setting up my server configurations in nginx they don’t want to work, I can only assume it’s a small thing.

I have 2 nginx server files, both are enabled.

First is custom, this is the production url with HTTPS

server {
        listen 443 ssl;
        server_name allagandata.com www.allagandata.com;

        ssl_certificate /var/www/acme/.acmephp/master/certs/allagandata.com/fullchain.pem;
        ssl_certificate_key /var/www/acme/.acmephp/master/private/allagandata.com/private.pem;

        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_prefer_server_ciphers on;
        ssl_dhparam /var/www/acme/.acmephp/master/certs/allagandata.com/dhparam.pem;
        ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-$
        ssl_session_timeout 1d;
        ssl_session_cache shared:SSL:50m;
        ssl_stapling on;
        ssl_stapling_verify on;
        add_header Strict-Transport-Security max-age=15768000;

        root /var/www/Production/public;
        index index.php index.html index.htm;

        location / {
                try_files $uri $uri/ /index.php?$query_string;
        }

    location ~ \.php$ {
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_index index.php;
        include fastcgi_params;
        fastcgi_intercept_errors on;
    }

        error_page 404 /404.html;
        error_page 500 502 503 504 /50x.html;
}

The second is the staging url:

server {
        listen 80;
        server_name staging.allagandata.com;

        root /var/www/AnExiledGod/public;
        index index.php index.html index.htm;

        location / {
                try_files $uri $uri/ /index.php?$query_string;
        }

        location ~ \.php$ {
                fastcgi_split_path_info ^(.+\.php)(/.+)$;
                fastcgi_pass unix:/var/run/php5-fpm.sock;
                fastcgi_index index.php;
                include fastcgi_params;
                fastcgi_intercept_errors on;
        }

        error_page 404 /404.html;
        error_page 500 502 503 504 /50x.html;
}

My DNS records:

$ORIGIN allagandata.com.
$TTL 1800
allagandata.com. IN SOA ns1.digitalocean.com. hostmaster.allagandata.com. 1475025426 10800 3600 604800 1800
allagandata.com. 1800 IN NS ns1.digitalocean.com.
allagandata.com. 1800 IN NS ns2.digitalocean.com.
allagandata.com. 1800 IN NS ns3.digitalocean.com.
staging.allagandata.com. 1800 IN A 162.243.102.77
allagandata.com. 1800 IN A 162.243.102.77

I did have a CNAME record in there but it didn’t seem to do anything.