Description:
When GeoAnalytics Builder applies geocoding to your map data, it returns a quality level based on the information provided.  These levels are:

Level 6: The best geocoding accuracy.
Level 5: Add a street number.
Level 4: Add a street name and street number.
Level 3: Add a ZIP code, street name and street number.
Level 2: Add a city, ZIP code, street name and street number.
Level 1: Add a state, city, ZIP code, street name and street number.
Level 0: Unable to geocode, provide a valid address.

Symptoms:
Valid addresses are given a quality level 4 when it is expected that they would be given a level 6.

Cause:
A practice that causes this issue is including "2nd address line" information, such as "Suite #" or "Apt #", in the main street address field. 

Geocoding returns a low quality level when an address is valid.

Remove the "2nd address line" information, or move it to a different field, then try the geocoding again.