It will only do what you ask it to do
A quick google found what appears to be a good article
here which talks through how to use it. In your case it sounds like you just want to create an automatic collection based on Author (or Author Sort). Ignore that *recommended* stuff in it, I personally disagree with, you don't need to import collections from the kindle or create a custom category if all you want is collections by author.
The only thing I didn't see on there was the discussion of metadata plugboards which you appear confused about on your other thread. They are just a way of putting series name into the title that appears on your Kindle so if you sort by title on the Kindle you see the books in order. There is an article
here which describes how to correctly set that up.
But you should really just ask on the thread above which is dedicated to it if you can't figure something out.