Events Not In Chronological Order

I inherited this site for a client. The events are not appearing in chronological order, but isn’t that the default setting?

Here is the archives-events.php that’s located within the child theme directory:

<?php get_header(); ?>

		<section class="content">

			<div class="pagetitle row">
				<div class="col-md-12">

					<div class="wrapper">
						<h1><?php
							if( eo_is_event_archive('day') )
								//Viewing date archive
								echo __('Events: ','eventorganiser').' '.eo_get_event_archive_date('jS F Y');
							elseif( eo_is_event_archive('month') )
								//Viewing month archive
								echo __('Events: ','eventorganiser').' '.eo_get_event_archive_date('F Y');
							elseif( eo_is_event_archive('year') )
								//Viewing year archive
								echo __('Events: ','eventorganiser').' '.eo_get_event_archive_date('Y');
							else
								_e('Events','eventorganiser');
					?></h1>
						<?php if(function_exists('yoast_breadcrumb')){ yoast_breadcrumb(); } ?>
					</div>

				</div>
			</div>

			<div class="row">			

			    <main class="archive-page <?php 

			    	if( $iw_opt['archive_sidebar'] == '2' ){
			    		// right
			    		echo('col-md-9 col-md-push-3');
			    	}elseif( $iw_opt['archive_sidebar'] == '1' ){
			    		//fullwidth
				    	echo('col-md-12');
			    	}else{
			    		// left
				    	echo('col-md-9');
			    	}

			    ?>">
			    	<?php if(term_description() != '') : ?>
			    		<p class="description"><?php echo term_description() ?></p>
			    	<?php endif; ?>

<!-- part-archive -->

<div class="archive">

	<?php if (have_posts()) : ?>

		<?php
		    // category id ('43')
		    query_posts(array(
		        'post_type' => 'event',
			'orderby'=> 'date',
			'order'=> 'DESC',
		        'tax_query' => array(
				    array(
				        'taxonomy' => 'event-category',
				        'field' => 'slug',
				        'terms' => 'flasco-events', // exclude FLASCO Events from main events archive
				        'operator' => 'NOT IN')
				    ),
		    ) );
		?>

	<?php while (have_posts()) : the_post(); ?>

		<article <?php post_class('row') ?>>

			<div class="col-md-4 col-sm-4">
				<a href="<?php the_permalink() ?>"><?php
			    if( has_post_thumbnail() ){
			    	the_post_thumbnail('mini', array('class' => 'img-responsive h2 center-block img-padder'));
			    }else{
				   	echo('<img width="400" height="300" src="http://placehold.it/400x300&text='. get_the_title() .'" class="img-responsive h2 center-block img-padder">');
			    }?></a>
			</div>
			<div class="col-md-8 col-sm-8">

				<h2><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></h2>

				<div class="event-entry-meta">

					<!-- Output the date of the occurrence-->
					<?php
						//Format date/time according to whether its an all day event.
						//Use microdata https://support.google.com/webmasters/bin/answer.py?hl=en&answer=176035
 						if( eo_is_all_day() ){
							$format = 'd F Y';
							$microformat = 'Y-m-d';
						}else{
							$format = 'd F Y '.get_option('time_format');
							$microformat = 'c';
						}?>
						<time itemprop="startDate" datetime="<?php eo_the_start($microformat); ?>"><?php eo_the_start($format); ?></time>

					<!-- Display event meta list -->
					<?php echo eo_get_event_meta_list(); ?>

					<!-- Show Event text as 'the_excerpt' or 'the_content' -->
					<?php the_excerpt(); ?>

				<div class="row">
					<div class="col-md-4 col-md-offset-8 col-xs-12">

						<a href="<?php the_permalink() ?>" class="btn btn-primary btn-block">
							<?php _e('Continue reading', 'medicals') ?> <i class="fa fa-caret-right"></i>
						</a>

					</div>
				</div>

			</div>

		</article>

	<?php endwhile; ?>

	<div class="row">
		<div class="nav-previous text-left col-md-6">
			<?php next_posts_link( '<button class="btn btn-default">'.__('Older posts', 'medicals').'</button>' ); ?>
		</div>

		<div class="nav-next text-right col-md-6">
			<?php previous_posts_link( '<button class="btn btn-default">'.__('Newer posts', 'medicals').'</button>' ); ?>
		</div>
	</div>

	<?php else : ?>

		<h2><?php _e('The content you are looking for is not found: try searching with different keywords or back to home page to navigate through the content.', 'medicals') ?></h2>

	<?php endif; ?>

</div>

<!-- end part-archive -->

				</main>

				<?php if($iw_opt['archive_sidebar'] != '1' ) : ?>
				<aside class="col-md-3 <?php if($iw_opt['archive_sidebar'] == '2' ){ echo "col-md-pull-9"; } ?>">
					<?php get_sidebar('archive') ?>
				</aside>
				<?php endif; ?>

			</div>

		</section>

<?php get_footer(); ?>

Any one see the error? Or know where I can find the fix?

https://wordpress.org/plugins/event-organiser/