Welcome @andreas_huysman
We had a discussion here yesterday and it included a lot of graphics explaining how to review your data storage usage the public UseGalaxy servers. Maybe this helps if you are concerned about where your data is or if you are over quota?
Then this topic covered more about how the computational clusters process jobs. I think it may help too!
Please give those a quick review, then we can follow up more here. I’m not sure if your jobs are simply queued (gray) or if they are paused (light blue).
The first is normal and expected! The second is also a bit normal but it means you need to take some action to free up more working quota space (and maybe decide to use the extended quota space when you rerun!).
These are clearly popular questions! 
But let us know how this turns out or if you need more help. Screenshots or a shared history link are one way to share your work for more specific feedback. → How to get faster help with your question