I don’t know the specifics of your application, of course, but I thought your stats are high enough - 31 ACT/3.8 uw GPA, correct? - to still be a shot for CSE. I would think they would offer you CLA as a worse case unless they figured it wasn’t the right fit. You might call and ask to speak to your admissions counselor just to get some clarity and reiterate your interest in UMN - I would think that would guarantee you an admissions decision to CLA if they won’t accept you to CSE.
Good luck!