Two examples this past weekend of flight arrival info not correctly displayed in the terminal. Flying YUL to YOW the person meeting my flight saw it posted that the flight had arrived even though it hadn’t yet taken off and I was still on the ground in Montreal. Same thing happened to a family member in YYJ. Flight from YYZ was posted as arrived but it was still in the air for a further couple of hours. What is the source of flight arrival/departure info in the terminal and what good is it if it’s consistently wrong?