From the sounds of this there's two possible outcomes (assuming good faith): They run again and set somewhere >300mph. If they do that then it's reasonable to say that the original run was legitimate. More likely they run again and they look very silly because all their calibration was screwed and their speeds are a long way off.

There's always the third possibility - shenanigans. In which case they'll either pull more shenanigans or they'll just try and slink away.

In the meantime it sounds like the record can be safely ignored.