I don't know what model of K2 you have, but if it's an upper level slalom ski you will be fine on it, though it's far from perfect for you. If it's a lower level ski then you should trade it in on something that's about 170+ cm.
|but the best ski shop in N Conway loads up on that length and has little much longer, so that might say something.|
If they haven't been drilled yet, put them back on-line and get out of them now. No, a shorter ski does NOT do better on ice, the more edge you have, the more control on ice.