Oh come off it, Peter Gelderloos. Of course anarchists are part of "the Left" or rather they can be. You're being too much of a literalist and it is getting boring. Everybody knows how the left-right distinction came about, the French parliament seating order yadda yadda. But since then these terms have been filled with meaning, meaning that is forever evolving.
Seriously, the real problem we as anarchists have, is people like you Peter, who get way too righteous about unimportant distinctions.