I know what I was trying to accomplish. I wanted a 12" loop from the start of the tread. If you notice my settings, I have it set as a loop in the hangoff rail and that is precisely what I was after. The only difference in your settings and mine is that I had it set to 1" where yours was 7-7/8". I changed the number to multiple different lengths yet the rail itself didnt change. As you can see in my photo, the connection point or rail metric has a bug in it. Since it has been over a month since my original post, I have since figured it out by modeling without using the stair metric and adjusting piece by piece manually. Here is what my desired rail was supposed to look like.
Attachment: New Compressed (zipped) Folder.zip