I have a job with one task which is to run a notebook.  The job run is setup with a File arrival trigger with my blob storage as the location.  The trigger works and the job will start when a new file arrives in the location, but it does not run for multiple files.

For example I had three files uploaded at different times.  First at 3:57:03, second at 3:57:07, and the last at 3:57:10.  Three new files arrived, but only one job was started.  Why did three jobs not get queued to run?