Thank you for your inputs so far!
I see that several of you mentioned that the user is banned... but I don't understand something: is there any connection between being banned and having those posts hidden...? I don't think there is any relevance of the user being banned / autobanned or even if he was not banned at all... Am I missing something here?
Besides, if his posts are in trashcan... shouldn't their number be shown as 0? Perhaps a mod can bring more light here...?
According to
Ninjastic.space, the user has made a total of 17 posts. 13 of those posts were made in one topic (topic=5339925
[archive]), while the other 4 posts were made in other topics. According to this, I assume that the user's post count changes only if individual posts are deleted, but not if the entire topic is moved to a
recycle board, because, technically, those posts are not deleted, but only hidden from the public. Also, hosseinimr93 mentioned that theymos periodically performs post count maintenance, because "there are several bugs which cause the post count to drift from its real value over time"
[reference]. It is possible that this is one of those bugs.
The fact that the user is banned, I think, has nothing to do with his post count (except in the case when the user is nuked).