[Questions/Bugs] Hentai, OVA/ONA, Brackets

[seniorm0ment]

I have a few questions and bugs. They may not be bugs, they could just be user fault (which is part of the question).

So, with Hentai all my hentai follow the scheme of:
Hentai/HentaiName/Season 01/hentainame - s01eXX - [xxxxxx]
(the end brackets may be episode information, an ID or something else that I want ignored. Not all have the brackets w info at the end)
If it's an OVA or ONA I still place it inside of a "Season 01" folder, not a OVA or ONA folder.
With this naming scheme, some hentai get detected and some don't.

I want to ensure that stuff in brackets will be ignored (judging by the fact that some hentai with brackets at the end of their files are showing up fine, and some aren't, it doesn't seem like that is the issue.)

I also notice every now and then some do not grab photos, but instead the photo says "You must be 18+ to see this". I assume this is some metadata provider giving issue.

And lastly, how I have my metadata downloaders setup/enabled are as follows:
if I didn't list it, then it's disabled.

Series Metadata Downloaders
TheTVDB > AniList > AniDB > Proxer > AniSearch > The Open Movie DB

Season Metadata Downloaders
AniDB

Episode Metadata Downloaders
The TVDB
AniDB

Series Image Fetchers
The TVDB
AniList
AniDB
Proxer
Anisearch
Fanart

Season Image Fetchers
The TVDB
Anilist
AniDB
Proxer
Anisearch
Fanart

Episode Image Fetchers
TheTVDB
Screen Grabber

I was wondering if any of these can be disabled or ordered differently to achieve the best results for hentai?

[mprentice]

I've turned off all downloaders and fill in hentai info manually. The metadata downloaders just don't seem to work right for hentai.