The elbow-joint effects are a consequence of the rather old and crude system Poser uses for joints. Posetts was far worse, but even with the improvements in the detail of the figure structure, you have the elbows bent plenty far enough. For the wrist, you may have put some Twist in the wrong place. One mistake I've occasionally made it to get to a +320 twist, when -40 would work better. Things like that might explain the fingers too. You can get odd effects when breast morphs are combined. Generally, Poser figures don't always articulate quite like a human. On V3, the collar groups can need to take some of the shoulder movement, especially when the arm is raised. The human elbow joint doesn't twist, but twisting the Poser forearm can make things look better. And be careful about hands. Some models have zero-positions with the fingers partly bent, some have fingers straight, and transfering a hand-pose can lead to fingers being bemt backwards.