When you save a pose there is 2 options you can use one of them saves just the pose. But the other one saves the pose AND the morphs on the figure. Some pose creators are a bit careless or just dont know better and save  poses WITH morphs when they should just save the poses.

  As mentioned above you can fix the poses yourself (though they should NEVER have been allowed into a store with morphs saved) by loading the pose and clicking the + on the bottom of your library and saving the pose again and when the option comes up to save with or without morphs save the poses WITHOUT.
Then your poses will work as they should have from the beginning.