I can find no mention of this 'Chaos Focus' you guys bring up in the CSM 'dex. Based on what I read in the Codex, the only way a Chaos psyker can get psychic focus on a table is if they are ML1. What's all this about 'Chaos Focus'? Even in the Daemon book I can't find this sentence anywhere:
Where's it at??
It's in the BRB actually, on the same page as the Psychic Focus rule.
RAI, it'd be one or the other. However, shoddy writing has left it that demons get to doubledip.