Confusingly, there us more than one "Starseed Academy" out there on the Internet. and I am not in a position to help you sort through them. But this one seems to be one put together by an entity and entities who have read their Leary and Wilson.
"The binary star system of Sirius is at the core of many calendars, texts and sacred knowledge of many ancient, advanced civilizations such as Lemuria, Atlantis, Ancient Egypt, Sumeria and many indigenous tribes around the globe." That's from the "Starseeds and Galactic Civilizations" section.
I can't find an "About" area claiming authorship for the site.
Hat tip: Charles Faris.