I DID IT.

If you have a RATED fic posted, and you add a RATED chapter, it won't show anywhere! Like if double rated isn't allowed to exist.
I means, surely it's a system problem with all the bad stuff happened lately with rated fics.. but it was frustrating.

So, if you post a RATED fic, just don't select RATED on updates, or you won't have your fic promoted @.@

Gyah.