title: Bing maps layer overlapping
body: <p>Hi I'm using bing maps v8. I have 2 default layers with pushpins. By default only the last added layer gets displayed on map. I have made the layer1 visible using setVisible function, Still it doesn't show up on the map. Is it existing but not showing up. I'm not sure why its overlapping. Its same with many layers.</p>
  
  <p>This is the code resembles somethis like this</p>
  
  <pre><code>var pushpin = new Microsoft.Maps.Pushpin(map.getCenter(), null);
  var layer1 = new Microsoft.Maps.Layer();
  layer1.add(pushpin);
  map.layers.insert(layer1);
  
  var pushpin2 = new Microsoft.Maps.Pushpin(map.getCenter(), null);
  var layer2 = new Microsoft.Maps.Layer();
  layer2.add(pushpin2);
  map.layers.insert(layer2);
  </code></pre>