Bing maps layer overlapping - bing-maps

Question

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.
This is the code resembles somethis like this
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);

Answer 1

You pushpins are in the exact same location. Both are rendered, but the one in layer1 is completely covered by the one that is in layer2, so you can't see it.
Here is a simple code sample to test. Simply copy and paste it into the edit window here: http://www.bing.com/api/maps/sdk/mapcontrol/isdk#addOneLayerItem+JS
var map = new Microsoft.Maps.Map(document.getElementById('myMap'), {
credentials: 'Your Bing Maps Key'
});
var pins = Microsoft.Maps.TestDataGenerator.getPushpins(3, map.getBounds());
var layer1 = new Microsoft.Maps.Layer();
layer1.add(pins [0]);
map.layers.insert(layer1);
var layer2 = new Microsoft.Maps.Layer();
layer2.add(pins [1]);
map.layers.insert(layer2);