I saw it too. It's crazy that they only see their parents once a year from the age of 3. China is one fucked up place. The Olympics are great, but to take kids away from their families is nuts. Even worse is the families tell them they have to stay there, to make their lives better.
What do you think was an oversight? That they said 15? They only need to turn 16 during the Olympic year, the fact they won't turn 16 for a few more years is another story.