No it isn't a mistake because that CPU was just release this yr. The latest bios is back in 12/2012. It is a 22nm CPU and it might work.
But do you take that chance that it might not too. Yes it does support a lot of the iby CPU's. It should work but they might have not updated the list.
They might have to do a bios update for that CPU too. I would call Gigabyte to make sure too.
