Answer to part two of my question.
file, prepare, drawing properties,
click on change that is located to the right of the detail options list.
search for dual_digits_diff
set value to "0"
click on Add/Change,
and close
on the next window, click apply and close. And another close.
This will set the default for just that particular drawing but all the dimensions to be dual and the decimal places to all be the same for both english and mm.