Registering for more than one team

Players registered to more than one team within the same age group, I'm not talking about duplicate FANs etc but clubs registering the same player for all three teams in one age group. The old system highlighted if a player was already registered to a team even in the same club but the new system doesn't.  It only flags if they are registered to a different club? Could this be rectified?

We have over 10,000 players so we do not have the time or manpower to be clicking on each player to check.