Help me understand stop processing actions?

I had about 20 rules for my download folder. I reinstalled the OS and soon afterwards Hazel but I didn't configure the rules. When I wanted to apply them I already had 120 files in my folder.

I realized that some rules wouldn't work although preview and log were showing that everything should be fine.
ChatGPT told me that there is something that is called stop processing.
Hazel will stop processing a file when it matches or something. It is hard to wrap my head around it, but...

Do I need to tag an item before move or rename items or it will always match the same rule again and again with the same file without going further?
Maybe someone could enlighten me?

Can you go through the troubleshooting guide here? https://www.noodlesoft.com/kb/hazel-tro ... ing-guide/

Report back with the results of each test.