First of all I want to say that the information you;ve provided is so helpful and I appreciate it
If I ended my shift for the day and explained to my employer that I could not stay over to meet with him, and he insist that I have to, Do I have to stay over my scheduled time and if I don't, is this misconduct?
The answer might depend on why you couldn't stay over and how long he wanted you to stay beyond your normal shift. Sorry for the long delay in this answer. I've been out of town a couple of times and haven't been checking for questions.