It was hot but well handled by ATC, regarding the Phraseology " cancel take off plans" repeated 3 times sounds like a (new?) FAA procedure and yes, is not ICAO phraseology, but so many things are not ICAO in US phraseology , but it worked well.
If the red bars were on (they should have been ) then the AA dif not only violate its clearance but also crossed red bars.. ( if they were on ) .The investigation report will be interesting to read .