When you are applying for a dual degree can you ED with the common app but RD for a specific school?

So I guess it’s a little too late to be asking this question since I’ve already submitted my app but basically I’m applying to Northwestern ED on the common app. I’ve put down that I want to dual degree in engineering and performance so that means I’m applying to both their school of engineering and music (clarinet) and I have to get into both. The thing is, the music was something that I wasn’t sure about until after the prescreening ED was due. I talked to my counselor and he said he thought it would be okay if I RD to school of music but I submitted my common app earlier. I put down that I even if I didn’t get accepted into one school and I wanted to continue as long as I was accepted into the other. Did I screw up?