1. 아직 해결되지 않으셨다면 올려주신 코드 중

400 쪽의 items를 4로 적용하신 후 다시 확인해보시겠어요?

아래 링크에도 답변 남겨드렸습니다.

https://www.cosmosfarm.com/threads/document/29524

2. KBoard 퍼스트 콘텐츠몰 스킨은 계층형 카테고리를 지원하지 않고 있습니다.

현재는 카테고리1, 카테고리2 기능을 사용해주셔야 할 듯합니다.

최신글 쪽에 카테고리를 표시하시려면 스킨 파일을 수정해주셔야 합니다.

FTP로 접속해서 /wp-content/plugins/kboard/skin/first-contents-mall/latest.php 파일 상단에

아래의 코드를 추가해보시겠어요?

<div class="kboard-first-contents-mall-sidebar kboard-sidebar-left" style="float: unset; width: 100%;">
	<?php if($board->use_category):?>
		<div class="kboard-sidebar-widget kboard-category-widget">
			<h4><?php echo strtoupper(__('Categories', 'kboard'))?></h4>
			<?php if($board->initCategory1()):?>
				<ul class="kboard-category-list">
					<li<?php if(!kboard_category1()):?> class="kboard-selected"<?php endif?>><a href="<?php echo $url->set('category1', '')->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->tostring()?>"><?php echo __('All', 'kboard')?></a></li>
					<?php while($board->hasNextCategory()):?>
					<li<?php if(kboard_category1() == $board->currentCategory()):?> class="kboard-selected"<?php endif?>>
						<a href="<?php echo $url->set('category1', $board->currentCategory())->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->toString()?>"><?php
						echo $board->currentCategory();
						
						$category_count = $board->getCategoryCount(array('category1'=>$board->currentCategory()));
						if($category_count){
							echo " <span=\"category-count\">({$category_count})";
						}
						?></a>
					</li>
					<?php endwhile?>
				</ul>
			<?php endif?>
			<?php if($board->initCategory2()):?>
				<ul class="kboard-category-list">
					<li<?php if(!kboard_category2()):?> class="kboard-selected"<?php endif?>><a href="<?php echo $url->set('category2', '')->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->tostring()?>"><?php echo __('All', 'kboard')?></a></li>
					<?php while($board->hasNextCategory()):?>
					<li<?php if(kboard_category2() == $board->currentCategory()):?> class="kboard-selected"<?php endif?>>
						<a href="<?php echo $url->set('category2', $board->currentCategory())->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->toString()?>"><?php
						echo $board->currentCategory();
						
						$category_count = $board->getCategoryCount(array('category2'=>$board->currentCategory()));
						if($category_count){
							echo " <span=\"category-count\">({$category_count})";
						}
						?></a>
					</li>
					<?php endwhile?>
				</ul>
			<?php endif?>
		</div>
	<?php endif?>
</div>

고맙습니다.