Number 22 on the list might mean another in the school, or two others if it's a big school. And maybe one in ballet class OR another one living nearby but probably not both.
Even a name like Emily which was number one the year my dd was born I think, there aren't two in my dd's class. There isn't ONE Emily in her class, although there's an Emily in the year above.
I know when you are having your 1st baby, it can be quite hard to relate the position of a name on a list to how many you'd come across in real life.
And again, it depends. flora was quite common where I used to live, not even in the top 100 I don't think.