You c an save as a preset if you like or not.
the advantage to saving the settings as a preset, is that you can quickly add the same form to another page if you like by simply selecting the preset that you saved.
you can se the same name each time, or you can save each preset with a new name.
as for the form action settings, you should only be concerned with that the first time you apply form builder.
on editing the form, the form action settings will not carry over.
to edit the form action settings, you should edit the universal email server behavior, go to the server behaviors window, and double click the universal email server behavior to edit it.