apparently, the librarian is a steve head, and the cleric doesnt drop a skull (i dont see it in config either)

also, the bag of gold sign doesn't work anymore on my server. its still green letter but doesn't interact at all

apparently cleric is a type of villager.. but i guess not if you don't see it in the code.

i fixed librarian :)

Ahh now I know. Cleric is a Career. I only test for Profession. Which means that the reward for the Priest and the Cleric is the same.

http://minecraft.gamepedia.com/Villager#Professions_and_careers

I only look at Profession because Villagers is not that important because they are not agreesive. I could easily test for career too, but then you would 13 new Mobs to configure, and because the are not that interesting too kill, I decided not to, when I learned about the difference between Profession and career.

I haver added this information in config.yml in new build/release, because it is not the first time I get this question, I just didnt recognize the name cleric :-)

I dont know what a cleric is???

and my guess is that librarian is spelled wrongly in your config.yml because this has been a bug in the past. But becuase I dont update your values in config.yml the bug has not been corrected in your config. check the spelling or delete the line "librarian-cmd" and restart your server and then the line will be auto created.