iowa guy

I booked Business class seats for an international trip and United sent me an email stating there was a flight change. On the email it showed my seating assignment but when I went to the United website and looked at my seating, there were not any choices available (the seating map didn't display) nor were any seat assignments listed. Were seats assigned to me? The email from United shows seat assignments but my reservation on United.com doesn't show seat numbers nor seat availability.

Thanks