What you're encountering is a caching problem.
Either your browser, the webserver, or something in-between
(like a caching HTTP proxy) is caching the page. When
it sees your next request it thinks "oh, I've already
gotten this page, so I'll ust the one I got before and stored".
What you need to do is put some HTTP headerers on
your page so it isn't cached.
Setting your HTTP headers as follows
shout make pretty sure that it won't be cached.
Content-type: text/html
Expires: Mon, 26 Jul 1997 05:00:00 GMT
Cache-Control: no-cache, must-revalidate
Pragma: no-cache
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