JavaScript OpenLayers3 : more than one overlay at a time?

Take a look at this fiddle. I'm using this tiny css (https://github.com/chinchang/hint.css) helper. The overlays are created with this function:

function createOverlay(txt, coord) {
    var div = document.createElement('div');
    div.className = 'marker hint-address hint--always hint--left';
    div.setAttribute('data-hint', txt);

    var overlay = new ol.Overlay({
        element: div,
        offset: [-20, -40],
        position: coord,
        positioning: 'center-center'
    });
    map.addOverlay(overlay);
}
Answer:1

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