If there are 33 crore demigods, then why does Shatpatha Brahman mention 33 gods?

From: Ravikant Jagtap

In Shatpat Brahmana 33 Type of Gods Are given,8 Vasu,12 Adityas,11 Rudras,Indradev & Prajapati.then 33 Koti Is Number Of Demigods Or categories