This is the first time I ask a question and don't receive any notification through my email about receiving an answer. I doubted the issue is with my question itself until I opened my account to find FIVE notifications. They were from two users (probably teachers) who answered my question. So I got to it again to find the number of answers inside and outside the question is ZERO.
I have checked it, and to be honest, I admire its style. But as you said, it doesn't have any "real" section. Maybe it is still incomplete...
italki had a pleasant tour in my account, and it appeared that there is no such inconsistency. It turned out that the two users were deleted, one deactivated his/her account, and the other was reported due to some messages.
Sadly, it is an unfortunate ending for both of them...
Thank you for sharing such useful details that are related to the same issue. I think I should contact italki support, so they can look at it.