Make sure your timetable is up to date on the CampusM app.
To do this you should regularly pull down on the timetable screen to refresh the data. Timetabled data is refreshed, once every 24 hours, overnight.
If it is still not right, check the central timetable is correct by contacting your faculty timetable co-ordinators who can liaise with Central Timetabling should changes need to be made to the timetable.