There are some extra blades growing on the fan leaves or one of my plants. They're growing above the normal blades and are a little smaller.
Different strains do different things. Shucks, even the same strain will throw some whacked leaves from time to time. So long as the new growth is healthy, and the rest of the plant does not appear to be stressed, I wouldn't worry too much about a weird leaf pattern or missing blades on fan leaves. Good luck