Yes this is absolutely normal, some people have wider spans of memories and some have short, doesnt really depend on your age. Your daughter must be young that is why she remembers alot and it might be natural. I to be honest am pretty young but I dont even remember anything before I was like 13 or 12 whereas my sister, she even remembers tiny little details of every memory even the color of the shirt. It is normal really and you've got nothing to worry about