If map pins show the exact same location for an item they may be sitting on top of one another. In that case you can just tap the pin again and again and the next item under the lower pin will show up in the "Directions" box on the map.
The other option is to choose less items to show on the map. Say only choose "Shows" and the map will have less pins.
To choose items on the map tap the map anyplace and a menu with choices will pop up. Select what you want and click "Done" and only what you have chosen with show on the map showing what is closest to you first.