multiple pins within same container not working

[line32]

Code is below. It will pin my .one element, but ignores my attempt to pin .two and .three

<style type="text/css">
    .one, .two, .three { 
        width: 100%;
        height: 500px;
        background-size: 100% auto;
        position: relative;
    }
    .one {
        z-index: 1 !important;
    }
    .two {
        z-index: 11 !important;
    }
    .three {
        z-index: 111 !important;
    }
</style>
<div class="mymain">
    <div>
    This is a nav section.<br />
    </div>
    <div class="main">
        <div class="one " >
            <h2>Section 1</h2>
            <p>Lorem ipsum dolar sit amet. Lorem ipsum blah blaah.</p>
            <p>Lorem ipsum dolar sit amet. Lorem ipsum blah blaah.</p>
        </div>
        <div class="two " >
            <h2>Section 2</h2>
            <p>Lorem ipsum dolar sit amet. Lorem ipsum blah blaah.</p>
            <p>Lorem ipsum dolar sit amet. Lorem ipsum blah blaah.</p>
        </div>
        <div class="three">
            <h2>Section 3</h2>
            <p>Lorem ipsum dolar sit amet. Lorem ipsum blah blaah.</p>
            <p>Lorem ipsum dolar sit amet. Lorem ipsum blah blaah.</p>
        </div>
    </div>
</div>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
    <script src="http://enterprise.blob.core.windows.net/microsoftcloud/pih/jquery.pin.js"></script>
    <script>


    $(".one").pin({containerSelector: ".main"})

    $(".two").pin({containerSelector: ".main"})
    $(".three").pin({containerSelector: ".main"})

    </script>