I had this fixed by Aeroplan a few times when same day change or misconnect and rebooking ended up in T rather than originally booked T+. This is often due to the originally booked class not being available.

One thing to be careful of is that AE post it manually as an adjustment so that your bonus miles i.e. Elite status miles and say the 50% fall promotion bonus would not post automatically so you need to either mention it when you call in or may have to call again to get the bonuses posted.