Whenever one event is moved to a different cell in Java Script scheduler, all other events appear to be moving as well. I didn't have this issue earlier, but it seems it is happening only after the latest update(8.2.222.0).
Are you able to reproduce this issue in the online demo? http://javascript.daypilot.org/demo/scheduler/
There is an option to link multiple events together so they will always be moved and resized together ("joint events"): http://javascript.daypilot.org/demo/scheduler/eventsjoint.html
But this has to be activated intentionally.