Bug - custom spells not visible in spellbooks

[darkpriest]

I am not sure if that's a bug or am I simply missing some override file but after learning a few of custome spells I do not see them in my spellbooks. I also do not see clerical custom spells in selection.
 
I've downloaded such files:
 
dialog.tlk - tlk catalogue
iprp_spells.2da - override catalogue
spells.2da - override catalogue
 
Am I something missing?