Hi Chris,
Is your locator based on the locator from post #22 of that thread (or later)? It appears that this issue was resolved in that version, although success with the locator seems to vary depending on the structure of your data (post #49).
If you are still having this issue, I suggest reply directly to to the ongoing thread in the geocoding forum. There seem to be some knowledgeable people following it, as well as others who are trying to do similar things. If you continue to have trouble with the scoring, Support may be able to help you verify that the locator is set up correctly.
-Allison