Aviation records rarely cater for dual nationality, which for those who have emigrated overseas is very common and requires them to travel with two passports. Issues with visas, and the inability to record different document details for different directions on the same airline booking, leads to significant inconsistencies. One may well have to show Iranian passports on departure at immigration to tie up with landing card details, but show Canadian passports to the airline to show ability to enter the destination country. Check in staff are fully familiar with all this but reservation system designers have overlooked it.
I still don't get one thing. The Malaysian shootdown over Ukraine one sort of sees, a lone radar image coming from a direction that hostility was expected from. But at Tehran the missile site was just on the departure side of the country's principal airport. There were a string of departures before this one. The missile crew must have seen them all passing on the same track, same height. Why suddenly this one ?