あなたの問題は、中央の列と3Dの翻訳です。
<ul class="portfolio-items center-block list-unstyled shuffle" id="grid" style="position: relative; overflow: hidden; height: 707.109px; transition: height 250ms ease-out;">
<li class="col-md-4 col-sm-4 center-block col-xs-6 shuffle-item filtered" data-groups="["people"]" style="position: absolute; top: 0px; left: 0px; visibility: visible; transition: transform 250ms ease-out, opacity 250ms ease-out; opacity: 1; transform: translate3d(0px, 0px, 0px) scale3d(1, 1, 1);">
<figure class="portfolio-item">
<a href="#">
<img src="http://lorempixel.com/700/400/people/1" alt="Item 1" class="img-responsive">
</a>
</figure>
</li>
<li class="col-md-4 center-block col-sm-4 col-xs-6 shuffle-item filtered" data-groups="["people"]" style="position: absolute; top: 0px; left: 0px; visibility: visible; opacity: 1; transform: translate3d(390px, 0px, 0px) scale3d(1, 1, 1); transition: transform 250ms ease-out, opacity 250ms ease-out;">
<figure class="portfolio-item">
<a href="#">
<img src="http://lorempixel.com/700/400/people/7" alt="" class="img-responsive">
</a>
</figure>
</li>
<li class="col-md-4 center-block col-sm-4 col-xs-6 shuffle-item filtered" data-groups="["futurama"]" style="position: absolute; top: 0px; left: 0px; visibility: visible; opacity: 1; transform: translate3d(780px, 0px, 0px) scale3d(1, 1, 1); transition: transform 250ms ease-out, opacity 250ms ease-out;">
<figure class="portfolio-item">
<a href="#">
<img src="http://lorempicsum.com/futurama/700/400/1" alt="" class="img-responsive">
</a>
</figure>
</li>
<li class="col-md-4 center-block col-sm-4 col-xs-6 shuffle-item filtered" data-groups="["futurama"]" style="position: absolute; top: 0px; left: 0px; visibility: visible; opacity: 1; transform: translate3d(390px, 0px, 0px) scale3d(1, 1, 1); transition: transform 250ms ease-out, opacity 250ms ease-out;">
<figure class="portfolio-item">
<a href="#">
<img src="http://lorempicsum.com/futurama/700/400/2" alt="" class="img-responsive">
</a>
</figure>
</li>
<li class="col-md-4 center-block col-sm-4 col-xs-6 shuffle-item filtered" data-groups="["simpsons", "people"]" style="position: absolute; top: 0px; left: 0px; visibility: visible; opacity: 1; transform: translate3d(0px, 236px, 0px) scale3d(1, 1, 1); transition: transform 250ms ease-out, opacity 250ms ease-out;">
<figure class="portfolio-item">
<a href="#">
<img src="http://lorempicsum.com/simpsons/700/400/1" alt="" class="img-responsive">
</a>
</figure>
</li>
<li class="col-md-4 center-block col-sm-4 col-xs-6 shuffle-item filtered" data-groups="["simpsons"]" style="position: absolute; top: 0px; left: 0px; visibility: visible; opacity: 1; transform: translate3d(780px, 236px, 0px) scale3d(1, 1, 1); transition: transform 250ms ease-out, opacity 250ms ease-out;">
<figure class="portfolio-item">
<a href="#">
<img src="http://lorempicsum.com/simpsons/700/400/3" alt="" class="img-responsive">
</a>
</figure>
</li>
<li class="col-md-4 center-blockcol-sm-4 col-xs-6 shuffle-item filtered" data-groups="["people"]" style="position: absolute; top: 0px; left: 0px; visibility: visible; opacity: 1; transform: translate3d(390px, 266px, 0px) scale3d(1, 1, 1); transition: transform 250ms ease-out, opacity 250ms ease-out;">
<figure class="portfolio-item">
<a href="#">
<img src="http://lorempixel.com/700/400/people/9" alt="" class="img-responsive">
</a>
</figure>
</li>
<li class="col-md-4 center-block col-sm-4 col-xs-6 shuffle-item filtered" data-groups="["simpsons"]" style="position: absolute; top: 0px; left: 0px; visibility: visible; opacity: 1; transform: translate3d(390px, 236px, 0px) scale3d(1, 1, 1); transition: transform 250ms ease-out, opacity 250ms ease-out;">
<figure class="portfolio-item">
<a href="#">
<img src="http://lorempicsum.com/simpsons/700/400/4" alt="" class="img-responsive">
</a>
</figure>
</li>
<li class="col-md-4 center-block col-sm-4 col-xs-6 shuffle-item filtered" data-groups="["futurama"]" style="position: absolute; top: 0px; left: 0px; visibility: visible; opacity: 1; transform: translate3d(0px, 471px, 0px) scale3d(1, 1, 1); transition: transform 250ms ease-out, opacity 250ms ease-out;">
<figure class="portfolio-item">
<a href="#">
<img src="http://lorempicsum.com/futurama/700/400/5" alt="" class="img-responsive">
</a>
</figure>
</li>
<!-- sizer -->
<li class="col-md-4 col-sm-4 col-xs-6 shuffle_sizer shuffle-item filtered" style="position: absolute; top: 0px; left: 0px; visibility: visible; opacity: 1; transform: translate3d(780px, 471px, 0px) scale3d(1, 1, 1); transition: transform 250ms ease-out, opacity 250ms ease-out;"></li>
</ul>
2つの列に余分な30ピクセルの上部と60ピクセルの上部があります。これはあなたが提供したサイトリンクの始まりに過ぎません。