Address Line 2, non-primary address

I have the

Configuration > Customer Details > Address Line 2 = false

but if someone continues through the registration process and
enters an alternate address for their delivery address, they
somehow get access to that second address line, which means
having to touch each address in phpmyadmin to move it all around.

I'm pretty good on editing the php to get rid of form code, but I just
need to know where to look to find it and get rid of it. Or...is there
another admin switch hiding somewhere else that shuts it off?
Or...has it been resolved in v139x?

Thanks

Dr Doug

I'm a little unclear on why you want to turn the address line 2 off in the first place, but you would need to edit:

tpl_modules_address_book_details.php

and

tpl_modules_checkout_new_address.php

to remove the 'suburb' parts.

I don't know of any admin switch for those.