Probably a bug.
No comments notification if someone mention me in not my own model (where i comment)
ON - someone comments on my models or mentions me
OFF - a new comment is posted on models I also commented on
I disabled second because i do not want read any comments not for me. But first one should notice me if someone mention me not only in my models.
I already missed too many comments because of this, and for this moment should check any new comment if i wait for answer.