For example, I blacklisted these:

male/male -female
male/male -intersex
male solo -female
male -female
male -male/female
male -intersex
male -intersex/male

In order to not show posts that have male unless they have female or intersex, for example. Basically everything that isn't male only, because for some ungodly reason, there aren't "male_only"/"female_only"/"intersex_only"/etc. tags. Anyways when I do this, and say, go to popular, it excludes all posts with the "male" and "male/male" tag, even if they have female or intersex (and related) tags. I tried switching the order, I tried adding commas, I couldn't find anything that made it work. Help would greatly be appreciated

You can probably remove every single one of those lines.

male -female -intersex

will on its own make sure that anything that's only males will not show up. No need for solo (You can't have a male and female while being solo).

Having those obsolete lines only makes it blacklist things multiple times, so you have to uncheck multiple things to get it to show those images.

Blacklist items on separate lines apply separately.

mysuri said:
male/male -female
male/male -intersex

blacklists any male/male post without the female tag and any male/male post without the intersex tag
meaning the only visible male/male posts will be those that include both the female and intersex tags

Similarly

male -female
male -male/female
male -intersex
male -intersex/male

This blacklists any male posts that don't have female and male/female and intersex and intersex/male, because any post that's allowed by a single blacklist item is instead blocked by the others.

magnuseffect said:
Blacklist items on separate lines apply separately.

blacklists any male/male post without the female tag and any male/male post without the intersex tag
meaning the only visible male/male posts will be those that include both the female and intersex tags

Similarly
This blacklists any male posts that don't have female and male/female and intersex and intersex/male, because any post that's allowed by a single blacklist item is instead blocked by the others.

Oh I see, thanks