The information you provide makes me think of poor coordination, general posture. The 5cm leg length discrepancy which disapears indicates a pelvis dysfunction. The whole indicates hypermobility. In general that responds badly on mobilisation, stretching but well on strengthening. Regarding acupuncture initial increase is not necessary a bad response but maybe overdosing (or if you have used GB21 that is the triggerpoint for the uppertraps and an irritation could well result in an increase). Try Li4, Lv3 and stay away from the neck and see what happens. How is the Scapula control and stability?