Yeah... I just had another look at it and it's hard to know where to begin though.

It's just the feeling of randomness you get when you browse through the articles. Some of the titles are incredibly specific, while others are very general, and the structure is unclear...

Here's an idea:

Hmm... maybe this might be more user-friendly with a search box front end, with a drop down box that lets you pick your tablet model.

There would be no front page index, just a search box, a bit like Google.

I know that's not standard for a Wiki, but it's what I'd do if I had to present this content on a website. It means that the lack of structure doesn't matter, and people will only see tutorials somehow relevant to the topic and tablet they search for.

There could be a link to the index page under the search box for people who really want to use it.