First off, a 2100 on the SAT puts you in the 96th percentile. So just wanted to erase the perception of it “not being very high.” And you’re right in the 50% for Olin.
2nd, as others have noted, a lot of colleges send 'personal invitations" to apply…they’re trying to up their numbers. That said, you really do sound qualified for what they are looking for and Olin is truly unique and worth a serious look.