Pete Roome

Expression engine only redirects to a 404 if the first segment ({segment_1}) of the url is incorrect. This means, if you enter the wrong url whilst in a template folder, the page will simply render blank or some other generic result, perhaps the first record in your channel, by default.

This can be fixed with a simple loop in the template, to check for {no_results}:

{if no_results}
{redirect="404"}
{/if}