Good observation. However, it has been like that since they last posted there.
It was always an abnormal gap in between post numbers.
The posts that would make up the gap in post numbers on that board have never been seen before. Meaning, to our knowledge there was not 80 something posts that were deleted. We all would have gotten alerts from our apps and scripts when a post was made there.
Is it possible for a board owner to create a post, make it hidden and potentially make it visible at a later date?