This is the best explanation I have seen of how your local listings data actually works.
There are many different data sources pulling in your local business data and it often times gets very messed up!
Here is why.
Some possible sources of data for your local listings:
You the business owner. (this should be authoritative but it is not)
Companies pulling data from phone records (Infogroup, Newster, Acxiom)
Google Street View cars that capture information.
Individuals who review the address information on sites such as google.com/mapmaker
Plus hundreds of other websites that are collecting your data as well.
What a mess!! and it all can impact your local search SEO.
If you need help with this and managing local reviews please contact us. We have a team that works with this every day and know exactly how to make this work for you.