the Map plugin is latest. you can try this:
1. when you edit the google map module, addess please enter: Agustín Manuel Chávez 1 – 001, Col.
2. when you cursor leave the inputbox, preview map will show. zoom it to the level what you want.
3. click the position that you think it is accurate, marker will dropped there.
4. set ‘Map Zoom’ to 20, and click ‘save’.