on the Silent as the Grave encounter card, it is stated that the following ability may be used in this encounter:

2 threat: Move Silence one extra space during her activation.

How is it different than the normal encounter ability allowing the overlord to move one monster 1 extra space for one token?

Is it a typo or did I miss something?

I too would like to know the answer to this. Maybe mail FFG direct as I'm not sure anyone official reads these forums (I may be wrong, but I dont see much in the way of official answers in other threads)

This question was asked on the old boards. I don't think that there was ever an official answer.