I've created several alternate assemblies and placed them in a drawing to show different stages of an assembly.
Parts within the views keep moving out of place and do not match the assemblies even after updating and saving all the members of the assembly and drawing. The drawing views do not match the assembly.
When you call a drawing view, it ask for which member the drawing needs to be. So, once you define the member while placing the view that would be final, or you should update that particular member.
Hope that helps.