I don't see why I made two "mistakes"!!!

http://en.lichess.org/Iqcs90ue#0

For me, this was the perfect game against an opponent who - with due respect - did exactly what I thought he/she would do.

The computer analysis wanted me to make a nonsensical "check" move that was easily countered, when I'd spotted a straightforward checkmate.

I was quite pleased with myself - 12 moves, 11 seconds, checkmate... until I saw the analysis :D

Have you tried posting it on bug reports? Its a pity really that stockfish didnt see the completely forced helpmate with 11. 0-0!! and instead insists on preventing your opponent from castling.

SF is right, 11.0-0 is bad, Deep Rybka 4 even gives it a near 0:00 eval.
There`s no bug at all.

easily countered? Not really, have you even check the stockfish analysis? Check with the queen get a black pawn and a good position ('cause of bxg7 after g7). 0-0 was considerate as a mistake because the check was a better move (after 0-0 you opponent can play knight f6 and you haven't any avantage anymore).
But that's 1min game ;-)

10. Qf3 is clearly a mistake what else to say... is that a joke? :P

Analysis of a 1+0 game? what a joke.