Aemoten pushed past Olan and the guards, yes, by drawing against the wall and then stepping in front of them. And well, the attack is vertical-[i]diagonal[/i] ... which should make it much harder for the yth to draw enough to the right, seeing how the sword's tip would have been slightly right of it to begin with (and it would be effectively incapable of drawing farther to the right than its arm's length allows). Basically imagine the sword being at some 25-degree angle at the lowest point from being completely vertical, and since the yth is left of Aemoten, not right in front of him, the sword would end up nearing the yth not directly, but from the left side and aimed across the centre. (Oeh... Trying to describe where not-one-dimensional things are in three-dimensional space as they move in time.) Does it change anything?

Edit: How great is an yth's armspan compared to its body, exactly? It isn't greater than their body length, or is it? It might be that I have been imagining them having somewhat relatively shorter armspans than they do have - at most 3 feet with this not-yet-full-size yth, not that much and barely the length of, for instance Aemoten's sword's blade and under the length of it's tip's trajectory - and therefore pictured it more locked in place in comparison to other things going on amongst other things...