Custom Post Type only working when Logged in

You would not believe how long it took me to figure out the problem:

I have a custom post type for events “temds10”, when I’m logged into wordpress, you can see the single temds10 posts via it’s url slug ?event=title_of_event, — but, if I’m not logged (like my audience won’t be) I’m hit with a 404 error. simply signing back in removes the 404 error, and shows the event.

I’m having an impossible time finding out why this is. My register_post_type() is set up normal, but two things I noticed when troubleshooting:
– if I set query_var to anything other than “event” every single thing on the site will 404.. as if wordpress is reliant upon it..
– if I change “temds10” to anything else and add a new post, it works perfectly fine, and I can see single posts logged in or out.. but I’ve coded way to much to change that as a perm solution.

that, to me, makes me think that something has gotten corrupt… but I haven’t a clue what.. I searched the databases for anything “temds10” but nothing was written..

$args_array = array(
		'label' 			=> __('Events'),
		'singular_label' 	=> __('Events'),
		'menu_position' 	=> 5,
		'public' 			=> true,
		'show_ui' 			=> true, // UI in admin panel
		'_builtin' 			=> false, // It's a custom post type, not built in
		'_edit_link' 		=> 'post.php?post=%d',
		'capability_type' 	=> 'post',
		'hierarchical' 		=> false,
		'rewrite' 			=> array("slug" => "event"), // Permalinks
		'query_var' 		=> 'event', // This goes to the WP_Query schema
		'supports' 			=> array('title', 'excerpt', 'thumbnail', 'editor')
	);
	register_post_type('temds10', $args_array);

Does anyone have the vaguest idea what’s happening here, and the route I should take to resolve it?