Protection of the Sepulchre doesn't affect Knights

[tombom]

of the Unholy Sepulchre.

I'm playing Ermor LA and have some of the Knights of the Unholy Sepulchre under a prophetised Censor. Every battle he only ever casts Protection of the Sepulchre but the Knights aren't affected. Is this intentional? Also, why doesn't the Censor ever try to cast anything else?

I did do a quick search, I'm probably doing something wrong

I am. Two seconds after I posed this I realised it's magic resistance negates and because they start with higher magic resistance they are less likely to get it. Apologies.