@Gumbymom & @ucbalumnus - any particular idea how this (major for waitlist admissions) works for UCSD (first choice CS, alternate major data science), Cal Poly (first choice - software engineering) and UCSC (first choice CS, alternate major Physics)? My guesses from your explanation - since Cal Poly admits to first choice major only - it will either be an admit into software engineering or very likely no admission. And UCSD waitlist confirmation would be as undeclared (as they admit to the university first then to the major). Not sure about UCSC.