"After completing the quest without convincing Chris Haversam of his humanity, he may simply say "Not now, its almost time for the Great Journey." over and over again without acknowledging the fact that they've already left without him. This can happen even if you convince him of his humanity...
:( I can't understand why they didn't add a diagonal moving animation. It can't be that hard. I guess there is no hope for it to be fixed anymore as it never got fixed for Fallout3.
Maybe if hundreds of people asked for it...