I'm sure I've heard the word misscheduled used multiple times in my life. But just now, my spell checker threw a fit. Since I wasn't sure if it should be misscheduled, mis-scheduled, or mischeduled I started searching - but I'm not finding it in any of my digital dictionaries.
Is misscheduled a proper English word? If so, what is the proper spelling? If not, what is a concise word that means someone scheduled something at the wrong time?