I think it is most likely that the hands and feet were intentionally skipped in the design, simply because of the difficulty in rendering them on a 'realistic' level. Also, the bones in the hands and feet are very small, and often carried off by scavengers. So, finding a skeleton with no hands or feet, or with seemingly damaged hands or feet, is common. Though a skeleton that magically holds together after all flesh, muscles and ligaments have decayed would be very odd.