I just read the whole post. I am having the same issue that you are talking about, but I still can not resolve it. My WAMP listening port is set to 4321. When i do localhost:4321 I do not see the WAMP start-up page.
When i do 127.0.0.1:4321 however i see it.
I can also go to 127.0.0.1:4321/phpmyadmin and it works fine.
I can also open 127.0.0.1:4321/wordpress/readme.html.
But when I try to go to 127.0.0.1:4321/wordpress or localhost:4321/wordpress it says Unable to connect to 127.0.0.1 and the url changes to localhost/wordpress (no port).
It does the same when I do localhost:4321.
Please help and kindly thank you