Can anyone explain this logic:

Flying back to the K from Montego Bay to the UK via Miami and they pull my 13 year old daughter for SSSS while boarding, so I say ok I'll wait here with my 10 year old daughter at which point I'm told you can't stay here it's a sterile area - i.e. the bit before the jet bridge where everyone walks through to board! A total and utter joke!

On the plus side, both ways through Miami have been smooth and easy through both immigration and security. Tonight at security at 'E' gates I was asked how many with you, I said, myself and my 2 daughters and we weren't required to go through the microwave scanner whilst everyone else had to. Seems to be absolutely no coherence at all!!