Do you experience problems during downloading?
Check your connection in Status and Interface settings window.
Use Test Server in Config > Servers.
We will probably ask you to do a test using only basic settings.
Do you experience problems during repair or unpacking?
Enable +Debug logging in the Status and Interface settings window and share the relevant parts of the log here using [ code ] sections.
120 is to much. In combination with 3 retries, it means that it takes 6 minutes
before SABnzbd knows it should skip an article.
Try 60 and make sure "use only for optional servers" is off.
Other than that, there have been some rare reports of deadlocks,
none which we have been able to reproduce.
A work-around is to set the priority of such a job to "Stop".