So, if I get it right, they scored her wrong because they though she stepped out of bounds, but she actually didn't. The coach appealed the scoring, and it was ruled that it was indeed ok, so she got points, which fairly placed her to 3rd place.
Now, it was overruled, because he appealed it 4 seconds late? That sounds pretty unfair, because it's not about her performance, which was eventually scored fairly and should get her to 3rd place, but about the process of the appeal, and by such a narrow margin.
While I get that such rules are in place, it feels wrong. Needless bureaucracy, and in this case there wasn't any malicious attempt to lawyer-up to get a medal she doesn't deserve, it was just a wrong scoring that should've been corrected.
This situation sucks for all the involved.