If this is working, it's peculiar

Out of 1700 messages, SS finds only 36 spam…and this with the most aggressive settings? The same spam, day after day is permitted, while good emails go into the junk folder. It is set up correct, otherwise it wouldn’t be catching anything. This about the third month, and if this is the best it can do, it’s trouble. I would be curious to know what can be done about making this program work.

You probably have SpamSieve and your mail program setup incorrectly, but not completely wrong, which is why it is catching a few of the spams. Most likely you have another rule interfering so that SpamSieve is only asked to filter a small fraction of the incoming messages. Please set the aggressiveness back to the middle and then check the setup or post a more complete report of your setup.