comment form missing and edit form not loading

Hello, I have the Wiki plugin installed and I cannot see a comment form for each wiki page. I have comments enabled. Example: http://durhamregionactionnetwork.com/wiki/dirty-electricity-and-emf/

Also when you go to a wiki page and click the Edit tab, the text area won't let me type into it. It defaults to Visual view. Playing around with it, each time I have to toggle to Text view and then toggle back to Visual view to add text. I wonder what the issue could be because I want to encourage users to collaborate on the wikis.

Also, can you disable the Advanced edit from users?

Thanks so much for any help you can provide!