After reviewing your real moderated content, I have determined that you were actually experiencing a known issue in the current version, and not what you initially described in the OP.
In the OP, you mentioned that the approval controls for wiki content were appearing in the moderation queue, but that there was no wiki content displayed above the controls.
In fact, there was no wiki content in the queue at all and no controls for wiki content at all. In the current version, there is a known issue where super moderators only are unable to fetch the moderation entries from the database correctly due to a key mismatch. The result is absolutely no wiki content or wiki controls in the moderation queue for super-mods. This is now fixed on your site using a fix already scheduled for 4.0.22.
Marking this report as fixed because the earlier report was private.