Hi Anup,
Appointments with the same time cannot be rendered one after each other, as the ScheduleView are ordering them by time.
You could assign different time to the ones with no fixed time, so that they appear after the fixed ones.
Could you please give us a bit more details about your scenario - which view you are using, are you setting some resources and everything you find it will be essential.
All the best,
Konstantina
the Telerik team