Aha, I got confused because you had replied to this post, which is about an iCloud mail syncing issue. I’ve moved the posts back to the proper topic.
Looking at the report that you sent in the context of messages with emoji subjects getting through…the last message that I see trained as spam was over a month ago on October 16. So SpamSieve does not think that it has been making any mistakes.
It looks like you are using Airmail. Which method have you been using to train the messages? There are several different ways described here.