I experienced the problem posted in other threads, so I ran the script to fix it.
Upon testing it, I found it quite interesting in that I had created a "test" tutorial awhile back, but had deleted the instance of the Help module from the website. I had found no reference to this existing tutorial anywhere, but when I did a search, it showed up!
So, that makes me wonder, can you access tutorials in other instances of the Help module just by searching for them? I had wanted to make some instances of the Help module private, accessible only to authorized personnel, but now I'm thinking that won't work because all they have to do to get at them is go to a public instance and search to find the tutorials!