bootstrap box spaning rows right side img element - html

Question

there's some problems with responsive grid system to me.
http://imageshack.com/a/img537/9687/4H48G0.jpg
http://imageshack.com/a/img539/8265/ANvr0Y.jpg - problem is here
My source code:
CSS
<style type="text/css">
.wrapper {
height: 100%;
text-align: center;
margin: 0 auto;
}
img { max-width:100% !important;
height:auto;
display:block;
}
.text {
color: #fff;
text-shadow:0px 2px 10px #000;
height: 100%;
left: 0;
position: absolute;
text-align: center;
top: 0;
font-size: 22px;
width: 100%;}
.box {
border: 1px dashed #000;
overflow: hidden;
position: relative;
}
.tb_floater {
font-size: 1.5em;
margin-top: 20%;
padding-top: 10%;
}
.box.tall {
height: 300px;
}
.box.tall > a > img {
height: auto;
}
</style>
HTML
<div class="wrapper">
<div class="container">
<div class="row">
<div class="col-md-4 box tall">
<a href="#">
<img src="http://www.websailer.com/wp-content/uploads/2013/07/www_image.jpg">
</a>
<div class="text tall">
<div class="tb_floater">
<p>Loren ipsum shit amet<br/>Loren ipsum</p>
</div>
</div>
</div>
<div class="col-xs-6 col-md-6 box" style="height:150px;">.col-xs-6 .col-md-6</div>
<div class="col-xs-6 col-md-2 box" style="height:150px;">.col-xs-6 .col-md-2</div>
<div class="col-xs-6 col-md-2 box" style="height:150px;">.col-xs-6 .col-md-2</div>
<div class="col-xs-6 col-md-6 box" style="height:150px;">.col-xs-6 .col-md-6</div>
</div>
<div class="row">
<div class="pull-right col-xs-6 col-md-4 box tall">
<a href="#">
<img src="http://www.websailer.com/wp-content/uploads/2013/07/www_image.jpg">
</a>
<div class="text tall">
<div class="tb_floater">
<p>Loren ipsum shit amet<br/>Loren ipsum</p>
</div>
</div>
</div>
<div class="col-xs-6 col-md-2 box" style="height:150px;">.col-xs-6 .col-md-6</div>
<div class="col-xs-6 col-md-6 box" style="height:150px;">.col-xs-6 .col-md-2</div>
<div class="col-xs-6 col-md-2 box" style="height:150px;">.col-xs-6 .col-md-6</div>
<div class="col-xs-6 col-md-6 box" style="height:150px;">.col-xs-6 .col-md-2</div>
</div>
That empty field is problem when i resize the browser, any solution ?