Allow Website Dont work

Do you happened to go by CoX_CX at Reddit? Slushmania answered to your question.
https://www.reddit.com/r/...ortinet_web_filtering/

If your Allowed in static URL list website is blocked by Category it is in, then it will be blocked still, as Category block rating overrides static URL allow action. In such case you would also need to put this website into Custom Category with action Allow. 
In addition, if you are using gin the same security rule Web filtering and AppControl, AppControl most probably will be checked first (flow mode), and if it blocks the website URL filtering allow will not help either.
To be sure no further security checks block the website, change the action from Allow to Exempt.
 

This solved the issue for me, but I'm trying to get an idea of why it operates this way.  With firewall policies it will go down the list until it finds a match and stops.  The same with routing in the fortivoice system, it'll look for a matching rule and then stop.
 
But web filtering keeps going after a match.  Any idea what the thought process was behind making it that way?  (I realize it's a pedantic question but sometimes the "why" is important).