IIRC when they first announced who were allowed to compete and try get a spot under the neutral status - there was something about that they still had to stay neutral and their neutral status would be checked again before Olympics. With other words, there was no guarantee for the neutral athletes to stay neutral all though they passed the "test" the first time. If anyone would have stepped wrong since last time (April?) they would simply lose their neutral status. And since the Olympic quotas for the AIN was given to the athletes, that would also have ment no one would replace them if they lost the status, all though they had reserves to begin with. Now, the athletes themselves know about this and have probably been very careful not to do anything that could change their neutral status. However - I´m not sure they are still being monitored now or if they guaranteed to compete under the neutral status? I mean if they aren´t doing more background checks, it´s unlikely to find something at this stage.