Changes to a UA Itinerary with a AC leg.

Good Afternoon all,

I have a upcoming trip SYD-SFO-YVR-YYJ that I have changed the dates to a week later then originally booked.

The last leg YVR-YYJ is on a AC flight. The rest are United

When I look at both my receipt for the change fees, and my booking on the united site the AC flight shows the correct changed date. However if I look at the AC site it still showing the original date??

Can anyone tell me if the last AC leg has been changed or not?

Thanks.