I have these two exploded screws (item 34) that can't seem to stay put. I move them, and when I open the drawing, they move somewhere else. I move them back, and they move somewhere else. I've never seen this before.
It is not a bad thing (sometimes it works very well). If a part is referenced to another explode step, changing the position of the those parts will also change the other.
It looks like the screws are also referenced in another explode step.