Woah. That is quite weird. Haven't heard of this issue before. From the sounds of it you had admin privileges but then used them to deactivate them? I just checked your privileges and didn't see anything weird, but I guess the fact that this is stickied is evidence. :P :/
Over on our beta-beta (I guess the technical term is "alpha") site, we're experimenting with a new system for Recent Comment, renaming it to "Recent Discussion" and tweaking some features.
The recent comments are organized by post, sorted in the order of "post most recently commented on", showing the three most recent comments for each post.
If you haven't read a post, it also shows a short blurb of the first 300 characters of the post (similar to how the recent comments themselves do).
A couple motivations for this:
Quick note (partly for my own reference as I check which of these we have fixed)
The first two links look they got fixed by Habryka's recent patch.
I haven't looked into the final issue, thanks for pointing that out.