Your interpretation is probably what was intended when they wrote the class, however by RAW you get them as spells known but are unable to cast them. This is due to the fact that sanctified spells need to be prepared in a spell slot to be able to cast and the PrC doesn't overwrite this. If you plan to actually use it in a game make sure to run it by your Dm first just to be sure but otherwise this is just another example of poor writing/editing by WotC.