Units Question & Scrapers deleting for days now - is this normal?

Hi.

I have 3 Spiders and played around with Units and still dont get it.

1 Job only is running, a lot of finished/canceled and deleted and still not possible to run a 2nd.

The deleted ones are for days there, maybe eating up the Units?

Or the finished ones?

I changed now data retention setting to 1 day, will this help?

https://prnt.sc/m060V8aGfV5w

Thank you, Vladi