Problem with clean and explicit versions of songs

I have this problem on both IOS and Windows in iTunes.

When I try to add clean versions of certain songs, it automatically adds the explicit version. This happens with MULTIPLE songs and doesn't appear to be random. For example, and you can try this too: go to the Clean Version of The Eminem Show (2002) and add all of it to a playlist.

I've attached a screenshot; Songs 1-11 are explicit, Song 12 is clean, Songs 13-14 are explicit, and songs 15-19 are clean.

This happens when I add the songs individually too; I've experienced a similar problem with Fat Joe's "All The Way Up" Remixes amongst others. This is extremely frustrating though as I like to have explicit/clean versions of all my year by year playlists.

This bug has prevented me from switching over completely from Spotify. Something so simple like this shouldn't be happening.