Семен

Думаю проблема в col-sm-6, максимум может быть 12 колонок, в данном случае получается 24.
getbootstrap.com/css/#grid-example-basic

Могу вам только с форматированием помочь :) а так надо сидеть и разбираться или взять готовое решение слайдера.

/***
 * Основной слайдер
 ***/

.primary-slider {
    margin-bottom: 32px;
    width: 960px;
    margin: 0 auto 32px;
    position: relative;
}


/* Меню разделов */

.primary-slider .catmenu {
    position: relative;
    background: #faf9ef;
    background: rgba(250, 249, 239, 0.95);
    z-index: 999;
}

.primary-slider .catmenu ul {
    height: 60px;
    position: relative;
}

.primary-slider .catmenu ul li {
    float: left;
    padding: 22px 0px 23px;
    font-size: 13px;
    text-transform: uppercase;
    position: relative;
}

.primary-slider .catmenu ul li div.level1 {
    border-bottom: 1px solid #faf9ef;
    border-right: 1px solid #faf9ef;
}

.primary-slider .catmenu ul li div.level1 div.subLevel1 {
    position: relative;
}

.primary-slider .catmenu ul li:first-child {
    margin-left: 0;
}

.primary-slider .catmenu ul li a {
    display: inline-block;
    line-height: 15px;
    color: #66786d;
    text-decoration: none;
}

.primary-slider .catmenu ul li a:hover {
    text-decoration: underline;
}

.primary-slider .catmenu ul li:hover {
    background-color: #fff;
}

.primary-slider .catmenu ul li:hover div.level1 {
    display: block !important;
    position: absolute;
    top: 60px;
    left: 0;
    background-color: #fff;
    padding: 20px;
    width: 215px;
    box-shadow: 5px 5px 30px gray;
}

.primary-slider .catmenu ul li:hover div.level1 div.subLevel1:hover div.level2 {
    z-index: 10000;
    display: block !important;
    position: absolute;
    top: -10px;
    left: 180px;
    background-color: #fff;
    padding: 20px;
    width: 215px;
}

.primary-slider .catmenu ul li div.level1 div.subLevel1 div.level2 p {
    border-bottom: 1px solid #e1e1e1;
    padding: 20px 0;
}

.primary-slider .catmenu ul li:hover div.level1 div.subLevel1:hover div.level2 p:first-child {
    padding-top: 0px;
}

.primary-slider .catmenu ul li:hover div.level1 div.subLevel1:hover div.level2 p:nth-last-child(1) {
    padding-bottom: 0px;
    border-bottom: none;
}

.primary-slider .catmenu ul li div.level1 div.subLevel1 img {
    margin: -3px 0 0 15px;
}

.primary-slider .catmenu ul li div.level1 div.subLevel1 div.level2 {
    border: 1px solid #e1e1e1;
}

.primary-slider .catmenu ul li:last-child div {
    left: auto;
    right: 0;
}

.primary-slider .catmenu ul li:hover div.level1 div.subLevel1 {
    border-bottom: 1px solid #e1e1e1;
    padding: 20px 0;
}

.primary-slider .catmenu ul li:hover div.level1 div.subLevel1.sub {
    padding-bottom: 0;
    padding-left: 15px;
}

.primary-slider .catmenu ul li:hover div.level1 div.subLevel1:first-child {
    padding-top: 0px;
}

.primary-slider .catmenu ul li:hover div.level1 div.subLevel1:nth-last-child(1) {
    padding-bottom: 0px;
    border-bottom: none;
}


/* Галерея */

.primary-slider .gallery {
    position: relative;
    height: 534px;
    margin-bottom: -60px;
    top: -60px;
    overflow: hidden;
}

.primary-slider .gallery .slides {}

.primary-slider .gallery .slides .slide {
    float: left;
    position: relative;
}

.primary-slider .gallery .slides .slide img {
    display: block;
    width: 960px;
    height: 534px;
}

.primary-slider .gallery .slides .slide .legend {
    position: absolute;
    right: 99px;
    top: 207px;
}

.primary-slider .gallery .slides .slide .legend .bg {
    background-color: #000;
    background-color: rgba(0, 0, 0, 0.8);
}

.primary-slider .gallery .slides .slide .legend .content {
    max-width: 330px;
}

.primary-slider .gallery .slides .slide .legend .caption {
    padding: 8px 10px;
    font-size: 24px;
    line-height: 28px;
}

.primary-slider .gallery .slides .slide .legend .caption .title, .primary-slider .gallery .slides .slide .legend .caption .title a {
    color: #edddb1;
}

.primary-slider .gallery .slides .slide .legend .caption .price {
    color: #cdc82a;
}

.primary-slider .gallery .slides .slide .legend .caption .price s {
    color: #4c4c3f;
}

.primary-slider .gallery .slides .slide .legend .desc {
    margin-top: 1px;
    padding: 8px 10px;
    font-size: 11px;
    color: #b9b19b;
}

.primary-slider .gallery .slides .slide .legend .cart {
    float: right;
    margin-top: 1px;
    padding: 0 14px 0 55px;
    font-size: 21px;
    color: #cdc82a;
    line-height: 47px;
    text-decoration: none;
    background-image: url('../images/slider-to-cart.png');
    background-repeat: no-repeat;
    background-position: 14px center;
}

.primary-slider .gallery .slides .slide .legend .cart span {
    border-bottom: 1px dotted;
}

.primary-slider .gallery .slides .slide .legend .cart:hover span {
    border-bottom: 0;
}

.primary-slider .gallery .pages {
    position: absolute;
    left: 0;
    bottom: 17px;
    width: 100%;
    height: 17px;
    text-align: center;
}

.primary-slider .gallery .pages a {
    display: inline-block;
    width: 15px;
    height: 15px;
    margin: 0 1px;
    text-align: left;
    text-indent: -9999px;
    border: 1px solid #c5c02a;
    border-radius: 2px;
}

.primary-slider .gallery .pages a.selected {
    background: #c5c02a;
}

.primary-slider .gallery .nav {
    position: absolute;
    top: 0;
    width: 50px;
    width: 100%;
    height: 100%;
    /*background: url('../images/slider-nav.png') no-repeat 0 217px;*/
    background-color: rgba(255, 255, 255, 0.4);
    background-repeat: no-repeat;
}

.primary-slider .gallery .nav:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.primary-slider .gallery .nav-prev {
    right: 50%;
    margin-right: 430px;
    background-position: right 277px;
}

.primary-slider .gallery .nav-next {
    left: 50%;
    margin-left: 430px;
    background-position: left 277px;
}

.primary-slider .gallery .nav-prev:hover {
    background-position: right 277px;
}

.primary-slider .gallery .nav-next:hover {
    background-position: left 277px;
}

.primary-slider .gallery .nav-prev:active {
    background-position: right 278px;
}

.primary-slider .gallery .nav-next:active {
    background-position: left 278px;
}

.primary-slider .gallery .nav-prev {
    background-image: url(data:image/png;base64,);
}

.primary-slider .gallery .nav-prev:hover {
    background-image: url(data:image/png;base64);
}

.primary-slider .gallery .nav-next:hover {
    background-image: url(data:image/png;base64);
}

Насколько я знаю, из коробки - нет. Можно свою реализацию сделать :)

а -o-border-radius пробовали?