Kale theme and author plugin issues

Hi, I am wondering why I cannot add multiple authors in the co-authors plus plugin. It will not show up on my site, only one of the authors will come up. Also, my show/hide author plugin is not working – it will only hide the authors name but not the ‘author:’ word coming before, i want the option to be able to show or hide that whole thing i.e: authors: Cassidy, Ailis (option to either show this or hide this). I also want the option to center the image on the kale theme for my featured image on individual posts/pages, and the title above the featured image as well.. and lastly there is an error in my theme code where it says i must fix before updating or it might break my site.

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