I'd have to add that as to what I can see your young one is not perfectly smooth on top at all but is pyramiding. With living conditions cannot see why but would be adding soaks and see if it starts smoothing out. The H2O dish is likely not deep enough to do the job.
I only got her a week ago, I'm not sure what conditions she was kept in before that. I read in one of the care sheets here that spraying their carapace every day helps prevent pyramiding, though it referred to hatchlings. Would it work for an older tortoise? In the meantime I'll start soaking her today. Should I soak her every day?