I dont work for Microsoft and can only guess what drives their user
interface design.

The only thing I can suggest is that you experiment with naming every column
in your data source in such a way that the columns appear in the sequence
you want. My guess is that Microsoft's software tries to match standard
address column names such as firstname, lastname, street, city, etc, and
will always present recognised names in a certain sequence. Maybe, if it
makes sense to you, you could name your columns 01_something,
02_somethingelse, and so on, and they will appear in that sequence. Awkward
for the users, maybe, but perhaps better than the alternative. Maybe you
could use an Access query to do it.

Peter Jamieson