Bootstrap popover is showing the same text in all popups

HTML

<link rel="stylesheet" href="http://jasny.github.io/bootstrap/assets/css/bootstrap.css">
<script src="http://jasny.github.io/bootstrap/assets/js/bootstrap-popover.js"></script>
<script src="http://www.outcoding.com/joe_edis_mockups/js/bootstrap.min.js"></script>
<div class="span3 block">
    <div class="control-group">
        <label class="radio span1">
            <input type="radio" name="optionsRadios" value="option1">Level 1 
                <a href="#" rel="popover" data-toggle="popover" data-placement="top" id="level1">?</a>
                <div id="acuty-level1" class="popover">Level 1</div>
        </label>
            
        <label class="radio span1">
            <input type="radio" name="optionsRadios" value="option2">Level 2 
                <a href="#" rel="popover" data-toggle="popover" data-placement="top" id="level2">?</a>
                <span id="acuty-level2" class="popover">Level 2</span>
        </label>
            
        <label class="radio span1">
            <input type="radio" name="optionsRadios" value="option3">Level 3 
                <a href="#" rel="popover" data-toggle="popover" data-placement="top" id="level3">?</a>
                <span id="acuty-level3" class="popover">Level 3 </span>
        </label>
            
        <label class="radio span1">
            <input type="radio" name="optionsRadios" value="option4">Level 4 
                <a href="#" rel="popover" data-toggle="popover" data-placement="top" id="level4">?</a>
                <span id="acuty-level4" class="popover">Level 4 </span>
        </label>
            
        <label class="radio span1">
            <input type="radio" name="optionsRadios" value="option5">Level 5 
                <a href="#" rel="popover" data-toggle="popover" data-placement="top" id="level5">?</a>
                <span id="acuty-level5" class="popover">Level 5 </span>
        </label>
            
    </div>
</div>

CSS

.block {
    margin-top:50px;
}

JavaScript

$('[rel=popover]').popover({
    html: true,
    content: function () {
        return $('#acuty-level1, #acuty-level2, #acuty-level3, #acuty-level4, #acuty-level5', $(this).closest('label')).html();
    }
});