ok, must have been algorythms going haywire again. They really shouldn't bust those trades, that would teach them.
Fat finger (rumor that apparently a large stop order in ZB went in as a limit one by mistake)... Everything above 131-12 busted (or, rather, adjusted to 131-12), allegedly. Similar in ultras.
Some guys in this forum may have been saying for years that one may hit the bid with any size, and a market would not move. If it falls, the fat finger is always there to explain it.
I believe in Canada 2, 5, 10, 30 us, 10yr bund, 10yr gilts, are all available cfd's. Not sure about other locations