Try switching the numbers around. It sounds like sending the mail to junkmail is “higher” on the food chain. I.e. If the SCL score is only 5 Archive but if it is 9 send it to junkmail.
Of course, the numbers are just a re-use of the numbers you stated– they can be what ever you want. basically, look at it from a perspective of severity. The more severe a score the more likely you want it to send the message to the junk mail folder.