Sorry about that- I was just looking at my in box notification and the attachments didn't show up there; I just built my own locator, and all three examples you give hit at 100 for me. When I use your locator I get no match at all with 112 e dupont ave and 100% for the other two examples.
I ran your locator against just the 'fulladdress' field to geocode a table; using your locator, I get all of the matched at 100 with the exception of 411A Michigan Ave; it does not match at all
Something is goofy if it works well on a list, but the find doesn't work. I have heard of the find tool not being optimal sometimes: my only suggestion is to delete your locator, and recreate it.
That should just about do it....