I have edited the form width to 526 to fit within my column, but the display lays out the form way too wide for the column with text running well into the old 800px wide layout.
I have edited both design and content layouts.
Also, there still seems to be no way to edit the existing from by calling up an edit layout from within the form. Following the instructions, WA wants to start fresh with a new form not edit the existing one.
turning out to be more trouble than hand coding.