Issue should be described with pictures attached. In time view, if you select multiple tasks and move them, when the tasks are dropped, all the tasks condense down into the same 1 hour block. I don't think this is expected and the tasks and associated times should translate relative to their original position.
Pic 1: Starting position
Pic 2: Move in progress
Pic 3: Unexpected behavior; all tasks in 1 hour block
Pic 4: Expected behavior; all tasks keep relative position