Daniel,
I'm not quite following you on what you mean by a 'batch' and 'use right-click "fill" to populate the other locators...". Are you doing that in ArcToolbox, ArcCatalog or through scripting?
I have used Python to create file based standalone address locators, but not in SDE or a File GDB. There hasn't been any issues with mapping of the fields. I currently have a problem with the 'Store Relative Path Names' checkbox that I can't set when using Python scripting, but I'll be submitting it to the forum shortly.
If you are using the same locator style and reference dataset, but need to have locators with different names you could make the various locator names into a Python list and loop through it referencing the same style and reference data. I can get you the code if you need it.