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 :/
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.