index loaded from a wrong port

I have a linux server and the following problem:

in httpd.conf I have different "virtualhost" directives like:

<VirtualHost EXAMPLE.COM>
ServerName EXAMPLE.COM
DocumentRoot /...path.../example.com
ServerAlias *.example.com
DirectoryIndex index.php
</VirtualHost>
....and so on for other domains...

if I go to "www.example.com/goofy" I'd like to obtain "www.example.com/
goofy/index.php", while the result is "example.com:8080/goofy" (no
"index.php" in the location bar and a different port: from the default
80 of the request to the 8080; the "index.php" is read as well, but I
need the correct location in the browser): how can I correct this?

note: there is a "port 8080" directive that I should leave. Anyway the
server works on port 8080 and on porto 80 (it works any of these:
www.example.com, www.example.com:80, www.example.com:8080,
example.com, example.com:80, example.com:8080)

Thankx!