Have you tried editing the animation graphs? You click on the key-shaped icon at the lower right side of the screen, on the animation tool bar to open the animation keyframe window. Then, click on the arrow next to the figure or element you want to edit. Then double click on the thing that is giving you trouble... probably the hip or body Y-tran. Then you will see the animation graph. You can edit the graph directly, but you may need to change from spine interpolation to linear or constant. Animating in Poser can be frustrating, but it is fun. I hope this helps, Ericroy