If a thread you posted in got removed, you wouldn't receive any message and I can see that the thread The sadness is called Merit got moved to the trashcan and you had 4 posts in it.
I also noticed that one day, for example, i was 50 and the other day i was only 48. I could not explain it. Because in case of an inappropriate post and subsequent deletion, the PM message will show that your post has been deleted. So it's good to know that this is when the whole topic is moved to the trash. And so also my post on the topic, so the number of posts in the profile is discarded. Thank you for clarifying the situation.