Powayseller: The Shea Homes website I linked above says “Sanctuary residents with children will appreciate the advantages of the Poway Unified School District”. My guess is that they aren’t in the Poway city limits, but they probably pay for the privilege of being in the district (as part of HOAs/Mella-Roos). When I was looking at various condos and townhouses in the Scripps Ranch/Sabre Springs area, I noticed a lot of them did exactly this. “Poway School district” means they can tack extra value (i.e. profit) into the selling price.
I went back and looked at the ad in San Diego magazine and the development is Stonebridge (as manMom noted). It looks like a big development, as they have 7 different communities.