This question popped into my RSS feed and, of course, I had to take a peek. The title is captivating.
Before voting to close, I tried to edit out the redundant tags, maybe just down to one. But when I tried, something weird happened.
What happened to all those tags? Maybe someone edited while I was crying at the quality of the question? But when I refreshed the page, the tags were still there.
I tried a couple more times, and while I noticed that the tags appeared to still be there for a fraction of a second (plain text), once the tag formatting kicked in all I was left with were these two tags. The same thing happens when you edit the entire question.
But, if you select all text in the textbox, removing the formatting, you do see the tags.
Bug? Also, enjoy my nested quotes.