Quote from that article ..
At this point, the pilot in command called for “go-around flaps,” which is a standard call in an Airbus in a go-around situation, and the pilot not flying (or “support pilot,” depending on which school you went to) will normally move the flap selector from “flaps full” to “flaps 3″, however in this case the co-pilot selected the flaps to the “flaps one” position.
Why doesn't Airbus modify the standard call to 'flaps 3' for a Go Around ?.. That way, there's no ambiguity and no excuse for not knowing what the go-around flap position should be.