Loves stated that "Mae seemed to be lost in her thoughts" so she's not really paying attention to where she's going, thinking about how life throws curve balls and such and wondering "what other surprises were in store."  >:)<br/><br/>She's probably moved past the washer and dry and a state room or two. You are correct, though, in that Dimitri couldn't have seen her move into that corridor unless he'd moved very close to the door to peer inside the window, however he did take a special interest in her and he did see her as she came back from the flight deck to help with Si. It's possible that she moved out of the Infirmary as the others made their way towards the shuttle- "Mae backed out of the way, leaving leaving the others to finish the journey to the shuttle without her." - watching them go up to the next level before slipping back inside the infirmary and "...tidying up as best as she could, trying hard not to look at the blood stained bandages and gauze." I don't think this ship has the observation windows in question, but those would only allow someone to look outside the ship anyway, at least in the way I understood on firefly.<br/><br/>Griff , upon descending the shuttle ladder, would be on the upper deck standing basically between Sasha's room and the Operations room. He would most likely move to the port side of the ship, passing by Si's room and the stairs marked as 1U before turning left to approach his room. Cherish was hiding near in the workout area, yes? Let's assume that Dimitri was hiding near the raised platform level on the starboard side of the ship, opposite of Cherish near the stairs marked 4L. When Griff passed by, Cherish could have simply moved down to the floor level, and hid beneath the stairs marked as 3L. Then she could have noticed as Dimitri made his move towards the infirmary, which he would have had to pass through to get to Mae. Cherish, having been a stowaway for  some time now, knows that there's the port side entrance to that corridor as well and moved to there to find Dimitri being nasty to Mae, though I think Mae have a little something for Mr. foul mouth herself. We shall see. ;)<br/><br/>I hope this clears any confusion?