Fix Bootstrap column issue

fix-bootstrap-column-issue.html

Since the columns are not all equal in height you need to add a clearfix <div> for the large viewports
just as the new row should start, that is between your 3rd and 4th column:

<div class="row">
    <div class="col-lg-4 col-md-4 col-sm-6 col-xs-6">...</div>
    <div class="col-lg-4 col-md-4 col-sm-6 col-xs-6">...</div>
    <div class="col-lg-4 col-md-4 col-sm-6 col-xs-6">...</div>

    <!-- Add the extra clearfix for only the required viewport -->
    <div class="clearfix visible-md visible-lg"></div>

    <div class="col-lg-4 col-md-4 col-sm-6 col-xs-6">...</div>
    <div class="col-lg-4 col-md-4 col-sm-6 col-xs-6">...</div>
    <div class="col-lg-4 col-md-4 col-sm-6 col-xs-6">...</div>
</div>