1. I cannot repeat the problem. Try clearing your browser cache and reload the page and try again. Can you please give more details about your installation environment? Are there any errors in the browser console (CTRL+SHIFT+I in Chrome)?
2. I cannot repeat the problem. Can you give a login to your VehicleTracker application so I can take a look?
3. A job start and stop time may be included if it is a common use case. Can you explain your business use case where you would use a start and end time for Jobs? How do you want to use the Dispatch plugin?
Please send an email to support [at] gpsgate.com and we can take it from there.