Cormac Doyle, That's good history to know. 'Explains a few things.
LordMiller, I always assumed that it was a typo.
As a Force spell, it could be SM'd to an instant and then SM'd to affect a fist-sized point instead of the whole object. Now it's an attack. I could see it made higher level then, perhaps. What level would you need for a Krush Crit?
Realistically, it looks like Staying is TK just in ONE direction in 3-d space. Whereas with TK, the direction of applied force could be changed.
David Johansen, I agree. With 'Movement' Lists, the spells that are quick and powerful seem easier than the slow precise ones. It's easier to bend/fold space than overcome weak forces acting on the object..