Thanks for posting this. 🙂
The mystery is Solved: If you check other topics with a sub-category (for example Other – http://www.epicgenerator.net/index.php/forum/other) you will see, that the subcategories are listed first, with their own Last post’s marked.
Then comes the category itself, again ordered by time. Below the pagination you will see “Last post on website wrong” as the latest, from Bug Report category.
Yes, the Solved category is really old, we should move some more recent solved topics to it. 🙂