I think I'm having the same problem. In Poser 6, I could copy a pose from one frame to another by saving it to a pose dot. Now, in Poser 7, that seems not to work - the pose dot saves, but applying it does nothing. It may possibly be saving frame 1 every time, irrespective of the actual frame number set, but I haven't done any experiments yet to try and narrow it down.

As a workaround I save into the pose library instead. I keep a library category called "Saves" which is purely for temporary use, and can be cleared out once the project is finished.