Keep us posted as to what you find out. I was about to email our private tour operator to let them know about the change, but I guess it may be better to wait a bit to see what is going on. I hope we get those two hours back and don't have to rush back to the ship by 4:45pm!
I just called and confirmed it is 4:45pm for Kusadasi (Ephesus). Initially she said 6:45pm... but then checked with a supervisor and said 4:45pm is the correct time.