We skip a post when:
- The author’s trust level is greater than TL1.
- The post belongs to a private message topic.
- The author is a bot.
- The author is staff (moderator/admin).
- The author has already made more than 3 posts in regular (non-PM) topics.
- The post has already been scanned 3 or more times.
If the test is working, I’m confident it has to be because one of the above.