If I set the web prefernces for ATLAS Max # jobs to No Limit, then it will only ever run one at a time. If I set to 2 then it will run 2 at one time.
If Max # jobs is greater than # of CPU cores then it will buffer some work up to the job limit.
For the other projects the No limit setting lets BOINC buffer work based on the preferences.
So given this it seems like ATLAS is somehow configured different to the other projects, could this be modifed to work like the other projects?