Well, i can tell you know that it has never happened to me in all my years of growing. Because the light is about 8 inches, the cotyledons maybe pointing up towards it. Otherwise i dont know. If it doesnt sort itself out, you CAN do the unthinkable, and actually cut them off. This is a last resort though. The plant can grow fine without them, although they do contain some food for the seedling, but like i said, if you dont get any joy from the growing forum, you can cut them off so you only have the serrated leaves showing.