Fizwig2, it sounds like maybe you inadvertently added keyframes close to, but not in, the last frame. That can make the spline interpolation go berserk You could check for this by clicking the little "key" icon on the timeline to open the keyframe palette. If you see keys in some frames other than the first and last frame, delete them.

Generally, a dynamic cloth sim is inherently an animation (the cloth moves). Even if the doll doesn't move or change pose, the cloth moves. But you can set the simulation to do several -or dozens of- frames of drape in he initial frame. That may suit you.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5