This problem occurs in infragistics version 7.3. In 7.2 it was not there.

If you open ultradayview in your application where you have 4 or 5 appointments in row i.e. one after another in next slots, and you drag the lowest appointment to its immediate upper one, all the appointmnts in the row are shrinked to half instead of our moved one.

For example  if you have appointments at 4:00, 4:30, 5:00, 5:30 and 6:00 PM (if one timeslot is half an hour). And if we drag the 6:00 PM appointments in the 5:30 slot, all the appointment boxes are shrinked to half, instead of 5:30 slots where we desire to put two appointments objecs.