Addresses next door sometimes are determined to be the same place

[jeffmaher]

Recreation steps:

1. From Maps, add property '1217 S 19th St'.
2. Walk through the entire addition process for it.
3. Return to Maps
4. Try to add property '1218 S 19th St'

Expected outcome:

Should display the 'X' pin and ask to add the property

Actual outcome:

Centers the map on '1217 S 19th St'

[jeffmaher]

Likely cause is the duplicate check radius. Making it smaller may fix.