When I charge my stock batteries in the stock charger at 3A, the light goes green when it's done. If I switch the selector to LIFE, the 2S indicator lights up. Why not the 3S indicator? What does this mean? If I then switch it back to LIPO, it seems to start all over on all red. Does that mean anything? If I move the charger at all, the plug loses connection and I have to jam it back in the hole and it starts back up again. Is this the result of Chinese (lack of) craftsmanship and therefore normal for this charger, or is it defective?