Welcome, @ebrandt
Different types of tools get routed to different clusters, and which cluster happens to be free for new jobs changes all the time. So, what is going on seems normal.
And remember, every time you delete and rerun a job, that new jobs is added back to the end of the queue again. If you do this often enough, a job may never get the chance to move up and actually run. So, try to leave queued jobs queued.
Later on, you can use a workflow. Or, you could use one now since each tutorial includes a workflow template. 
Using a workflow queues all of your jobs at once!
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Hope this helps!