You can see that the "/templates" directory created is NOT a physical directory with symbolic like shown in the video 0.b slide 34.
I didn't saw like that the reason but the directory should be a physical directory and not a symbolic link.
In addition, if you read the master "params.ini" file instead of the specific one for the slave, this can also be due by the joomla template that you are using. Some template companie have redevelop they own framework that bypass joomla.
So event if you have the "/templates" directory full shared then you should read the correct params except also if you are connected on the master instead of the slave as you expect.
If you want that I have a look directly on your environment, I can just suggest to buy our billable support at
www.jms2win.com/en/joomla-multisite?page...35&category_id=1