Web Service Geocoding Results Inconsistent

We are making a call to the CSV version of the geocoding web service.
It seems that the same request returns different results randomly.

http://maps.google.com/maps/geo?q=4330+Shawnee+Msn+Prkwy,Shawnee+Msn,KS,66205&key=[our
key]&gl=en&output=csv

When I paste this into a web browser and hit refresh, the following
two results are returned at random.

Result 1:
200,5,39.0313154,-94.6347041

Result 2:
200,8,39.0288449,-94.6363640

Anyone else experiencing this issue?

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