title: Last Execution Time and Next Execution Time Not correct
body: <p>I am using Quartz.net.</p>
  
  <p>I have configure job with attribute DisallowConcurrentExecution. I want single instance of that job execute.</p>
  
  <p>I have configured trigger that fire every 10 seconds but in some situation my job get more than minutes to complete. Once this happen I can not see Last Execution Time and Next execution correct. It still refer to old time.</p>
  
  <p>I am new to quartz but I know that thread pool might schedule job that in queue and when one instance complete and new will get start because of attribute configuration but why it is not maintaining time of execution properly.</p>
  
  <p>Please help.</p>