I flew ORD-YYZ-BOM where the first segment was UA and the second one AC. Ticket was issued by AC (014 stock). MP credited the first flight but the second one is missing. I attempted to credit it manually today on the website but it was denied.

"Denied.
The ticket number you entered is not a valid ticket number. Please make sure you enter the correct ticket number."

The request status also says that the first segment was credited:

"Credit for this flight segment/ticket has already been posted to the MileagePlus account."

Has anyone experienced this before? Flights were flown a little over a week ago.