Why Can Students Apply Early Action & Early Decision Concurrently?
There are a handful of colleges … mostly hyper-selective ones … that prohibit Early Action candidates from applying Early Decision elsewhere (and a few of these prohibit candidates from applying Early ANYTHING elsewhere). High schools, however, never impose such restrictions. These come from the colleges themselves.
As a college counselor and also as a parent, I don’t have any problem with a policy that allows students to mix Early Action applications with an Early Decision bid, as long as the student understands that–if admitted to the ED school–he or she MUST attend (barring financial aid inadequacies, of course).