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.
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 :/