I think jacob got a friend to double team the servers. Or he's retired from his love making to the servers, and has passed down the throne to another tech who fancies servers a tad too much
I don't have any notifications turned off, but I've not been notified when mentioned before now. I also sometimes get notified when I receive an upvote and sometimes I don't. I also get notified when I make a thread, saying I've responded in it... it's the opening post.
I couldn't tell you about h-manga uploads, I generally just view content when I feel like it.
But it seems like the whole system is just consistently fucked all the time.