Yeah, its one of those offside calls I see linesmen miss now and then, the farthest player in a set piece being slightly but clearly offside, one of those typical understandable mistakes (as it goes by quickly, and some things like that they miss now and then).
Its not as an outrageous imcompetent stuff like the Maicon stuff. Or not the Sevilla offside tonight, while this case happens more then not, the Sevilla one is 1 in a million...