Hi,
Could you please close your duplicate post on wordpress.org? This forum is the right place for your question and I’ll try to help you here.
Do you have an example of an address that you think is being reformatted?
MapPress calls the Google geocoding service for its results. Google does use a different geocoder for their own maps application, but the two are generally in sync.
You can see what Google actually returns for a particular address by typing it into your brower (replace ‘youraddress’ with the address you’re interested in):
http://maps.googleapis.com/maps/api/geocode/json?sensor=true&address=youraddress