As we explained in a past article, we found that sometimes wordpress URLs could be redirected to other post articles with no connection whatsoever with the first URL.
There are two options to disable the autocomplete feature from wordpress URLs. The first one would be to add the following code at the end of your function.php
function remove_redirect_guess_404_permalink( $redirect_url ) {
if ( is_404() )
return false;
return $redirect_url;
}
add_filter( 'redirect_canonical', 'remove_redirect_guess_404_permalink' );
You can also install a wordpress plugin that contains this code.