well, now i feel like an idiot"too clergy" was an extra song made by Mike Geno and was planned for the original mod, where Ruv and Sarvente would sing against BF at the same time, but this was cut. https://fridaynightfunking.fandom.com/wiki/Sarvente in the wiki of both characters you can find sketches and notes for the song as it was planned for being added. i added it into the album because i thought it fit nicely and it's a good song as is, hence the "BONUS".
"casanova" was a late april fools song added by the devs into the game, sung by the non-canon son of Ruv and Sarvente named Selever. https://fridaynightfunking.fandom.com/wiki/Selever you can check things about that here. sorry for any confusion!