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There could be several reasons for this issue:

1. Cache: The browser might be caching the page and retrieving it from the cache instead of requesting it from the server. Try clearing your browser cache and reloading the page.

2. Server-side caching: The server might be caching the page and returning the cached version instead of generating a new one. Try modifying the URL parameters to something unique that the server has not seen before, or contacting the server administrator to disable caching.

3. URL parameters not being passed correctly: Check that the URL parameters are being passed correctly and are being interpreted by the server. There may be a problem with the way the parameters are being encoded or parsed.

4. JavaScript issues: If the page relies heavily on client-side JavaScript, the changes to the URL parameters might not be properly reflected in the page without executing JavaScript code to update the content. Check if there are any errors in the JavaScript console.

5. Server-side issue: There might be an issue with the server code that is not properly updating the content on the page based on the new URL parameters. Contact the server administrator or the website developer to investigate further.