Wiki Question: Does Anyone Know How #lsth Works?

[loramin]

I was trying to update some information on the Shaman wiki page today and somehow inadvertently took out the Pet information section in the process. The strange part is:

A) I didn't edit that section
B) if you edit that section and preview it, the pet info table appears just fine
C) the code is identical to the code for the Necromancer's pet info section (if you change Necromancer=>Shaman), and that page works fine
D) if I undo my change, it doesn't fix the section

The code for that section is just:

{{#lsth:Pet Guide|[[Shaman]] Pets}}

So, does anyone have any idea how that lsth tag works, or better yet why it stopped working?