Custom Post Type Featured Image Archive

Hello!

I have created a Custom post Type called “Projects”. I have several custom categories set up under projects. I have successfully set-up Custom Post type archives for single categories but I would like to create an archive that has 2 categories with their child post listed afterwards (called “Kitchens & Baths”). So for instance I would like to set up an archive that has “kitchen-category” and then all posts under kitchen and on the same page underneath have “bath-category” with all post under baths.

Here is a link to the archive which just has one category and posts. I would like to add “baths” underneath this set.

https://sandraschmitt.com/cavdesign/blog/project-type/project-kitchen/

Code for this archive.php page:

<?php get_header(); ?>

<div id="main-content">

<h2><?php single_cat_title(); ?></h2>

<div id="gridcontainer">

<?php
global $query_string; //Need this to make pagination work

/*Setting up our custom query (In here we are setting it to show 12 posts per page and eliminate all sticky posts) */
query_posts($query_string . '&caller_get_posts=1&posts_per_page=12');

if(have_posts()) :	while(have_posts()) :  the_post();
?>

			<div class="griditemleft">
				<div class="postimage">
					<a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>"><?php the_post_thumbnail('category-thumbnail'); ?></a>
					</div>
                		<h2><a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a></h2>
			</div><!--griditemleft-->

<?php
endwhile;
//Pagination can go here if you want it.
endif;
?>

</div><!--gridcontainer-->

</div><!--main-content-->

<?php get_footer(); ?>

I was thinking I would just be able to duplicate the loop with each category somehow specified but I have not had any luck. Not sure I am even using the correct terminology to research correctly. I have been stuck on this for a while unfortunately. Any help would be greatly appreciated.

Thanks!
sandra ??