if you dont upload the waue_contact-led-warehouse-confirm_1.php file, any changes you make localy will not be feected on the server.
yes, when you set the from name it becomes part of the from address. on reinspection it will not be i nthe from name setting any more, it will part of the from address.
the form for the from field is:
where the e mail address is in <>.
it is easier to initially set this using the from name portion of the UI, but once set, it becomes part of the from address.
As for the form lables.
you have 2 options:
1) The template has code to automatically loop through the form filed, it will use the form element names as the labels. when writing the lables, it will remove underscores from the element names.
when creating the fomr, use element names that you would like to use as the lables in the form.
2) if you have the form created and the element names are not working for you lables, you will need to remove the code that automatically loops through the form fields and create the form display manually as outlined in the "Add select form elements" section.