$all_tags adding extra h1 tag

I am trying to figure out why extra <h1 class=”category-title”> are being inserted into the markup.

here is the code/loop I am using inside of archive.php:

elseif (is_archive('the_tag')) {

	  if ($all_the_tags);
	    $all_the_tags = get_the_tags();
	    foreach($all_the_tags as $this_tag) {
		    if ($this_tag->name == "test1" ) {
		      echo '<div id="cat-title-logo" ><img alt="test1" src="' . get_bloginfo('template_url') . '/imgs/logo-test1.jpg"/></div><h1 class="category-title">';
		    } else if ($this_tag->name == "test2" ) {
		      echo '<div id="cat-title-logo" ><img alt="test2" src="' . get_bloginfo('template_url') . '/imgs/logo-test2.jpg"/></div><h1 class="category-title">';
		    } else {
			    // it's neither, do nothing
		      echo '<h1 class="category-title">
  <!-- not tagged as one or the other -->';
		    }
	    }
	    single_tag_title('Tag: ');?>

	</h1>

The HTML markup looks like this:

<h1 class="category-title"></h1>
<h1 class="category-title">
    <div id="cat-title-logo"><img src="https://www.foobar.com/wp-content/themes/blah/imgs/logo-test1.jpg" alt="test1"></div>
</h1>
<h1 class="category-title">Tag: test1</h1>

as you can see it’s inserting 2 extra h1 tags, 1 empty one, and 1 wrapping one. Is this part of core functionality or something?!?!?!?