I don't think this is actually a bug; let me gently suggest that I think you are probably using the wrong API for looking up "Carson, CA." I'm not being harsh, just trying to help. But Geocoding has two basic functions:
- Given an address as input, reply with the best Lat-Lng coordinates for that address.
- Given coordinates as input, reply with the closest known address (sometimes called Reverse Geocoding).
With "Carson, CA" as input, it doesn't seem like you have given enough information to have defined an address, which probably means that the Geocoder just didn't have enough information. The same goes for the Store Locator; "Carson, CA" isn't a store.
I think what you do want to use for a search of this kind is the Google Places APIdev-guide, because you are actually looking for a place, not coordinates or an address. Using the Google Places Autocomplete, for example, you can set the tool to search for different types, for example: countries, cities, or geocode (and there are others). The first, countries will let you find places such as: Australia, Bahamas, or Canada. The second, cities, will let you find places such as: Albuquerque, Baton Rouge, or Carson, CA. The last, geocode will restrict you to address searches, which is essentially what you are using when using the Geocoder.
I made the same mistake myself the other day when I sent a request to the Geocoder that contained "Wrigley Field"; the result was some address in Georgia on "Wrigley Field Road," which had me very confused until I thought about it for awhile and then it made sense. Wrigley Field is a place, not an address. I have been working with the Autocomplete a bunch lately and that has really made the difference between the two modes of lookup clear. As a possible solution for you, if you don't provide a specific type to the Autocomplete, it will use all of them, which will allow you to find places and/or addresses. It might give you a more functional solution for your site.
Anyway, just trying to offer some helpful feedback and I hope I did help -