portfolio not displaying sequentially the order in html i have below. it just displaying randomly on browser. displaying second image first, then first, then fourth & then third. any idea how to turn this off. i want to display the thumbnail image in browser html sequence i have in order first, second, thrid & fourth
<div id="portfolio" class="portfolio grid-container clearfix">
<!-- First Image-->
<article class="portfolio-item pf-int">
<div class="portfolio-image">
<img src="First.jpg" alt="Overview">
<div class="portfolio-overlay">
<a href="First.jpg" title="Overview - Midnight" class="left-icon" data-lightbox="image"><i class="icon-line-plus"></i></a>
</div>
</div>
<div class="portfolio-desc">
<span>Overview First</span>
</div>
</article>
<!-- Second Image-->
<article class="portfolio-item pf-int">
<div class="portfolio-image">
<img src="Second.jpg" alt="Overview">
<div class="portfolio-overlay">
<a href="Second.jpg" title="Overview - Midnight" class="left-icon" data-lightbox="image"><i class="icon-line-plus"></i></a>
</div>
</div>
<div class="portfolio-desc">
<span>Overview Second</span>
</div>
</article>
<!-- Third -->
<article class="portfolio-item pf-int">
<div class="portfolio-image">
<img src="Third.jpg" alt="Overview">
<div class="portfolio-overlay">
<a href="Third.jpg" title="Overview - Midnight" class="left-icon" data-lightbox="image"><i class="icon-line-plus"></i></a>
</div>
</div>
<div class="portfolio-desc">
<span>Overview Third</span>
</div>
</article>
<!-- Fourth -->
<article class="portfolio-item pf-int">
<div class="portfolio-image">
<img src="Fourth.jpg" alt="Overview">
<div class="portfolio-overlay">
<a href="Fourth.jpg" title="Overview - Midnight" class="left-icon" data-lightbox="image"><i class="icon-line-plus"></i></a>
</div>
</div>
<div class="portfolio-desc">
<span>Overview Fourth</span>
</div>
</article>
</div>