1) Latitude and Longitude are not generating automatically.
Please make sure the address you entered is complete including a zip code.
You can "google" the address, it'll show a map with a correct address. Please copy it and paste it to the address field
2) The marker on the map is not correct.
It may happen that even though the address you entered is correct, the marker on the map is a little bit off.
You can manually adjust Latitude and Longitude.
Please go to this website: itouchmap.com
Enter your address into the search field, then click on the map, move the marker to the desired location.
The latitude and longitude coordinates of the point will be shown in the boxes below the map.
Copy and paste the values to the "Add your store" page changing the automatically generated coordinates.