If i am understanding it right, the only time IN attempts to break line of sight is when Lisita moves behind the pillar. Tordor would probably be able to track her movement up until she moves behind him, meaning that he may have as well been expecting an attack from behind without having to rely on additional information from the spirits (which, IMHO, shouldn't be used in combat given Khan's current description in their CS, since this would be too useful of an ability in a 2v2 fight to not be explicitly stated and even accentuated).

I'm a bit perplexed with the positioning of Tordor's and IN's characters though, so i'll read a bit more into that and form my opinion on this matter ASAP.