Home Network Setup

First, I apologize if this topic has already been discussed, I have looked and been unable to locate responses to help me resolve my configuration issue.

Environment:
• Hardware: QNAP TS-419+ (Apache webserver)
Network:
• Cable Modem (configured in bridged mode to pass all traffic thru)
• Netgear WNDR4500 (connected to cable modem) configured with Static IP provided by cable company, also performing NAT and DHCP
• QNAP connected to the Netgear router with (192.168.1.50) Web server configured to use port 80
Wordpress install
• Wordpress 3.1.2 that was then upgraded to 3.5.1
• Standard install with WordPress installed in /web/wordpress

Problem:
I am not able to get the above components configured such that external requests will properly route to the QNAP AND to the WordPress subdirectory. The Netgear has port forwarding configured to pass all external port 80 requests to 192.168.1.50:80. I have also tried using a virtual server to pass the incoming request to the /web/wordpress directory. That seemed to work but when I tried to log in and administer the site, the virtual server configuration seemed to restrict any access to the site.

Goal:
First, I need to understand how to configure the above to properly pass traffic to and from external requestor, while ensuring I can administer the site from anywhere.

Eventually, I want to host three different blogs with independent accounts. I do not want to share account access across all three sites. I currently only have one static ip and would like to figure out the best way of routing traffic to the three sites using the single ip.

I appreciate any help you can provide. Thank you