Is it normal for a nose to go through significant shape change and tip droop after rhinoplasty? (Photo)

I had an Asian rhinoplasty in Korea2012. The immediate outcome was a perfect, straight and shapely nose with the tip slightly upturned. However, as time went on, the tip drooped so significantly and a small hump seems to appear on nose bridge, shaping the overall nose into a droopy or hook shape nose (See picture). MY original nose was never hook or droop shape. Procedure: Raise bridge with Goretex, osteotomy to narrow bridge,bulbous tip refinement with septal cartilage, alar reductio