As an FYI to others, just had the following email exchange with Columbia, regarding questions 4 & 5 (honors, and activities)
ME: For questions 4 and 5, which ask the applicant to list honors and
extracurricular activities, is it acceptable to type "Please see
attachment" and attach a sheet with the full list of honors and
extracurriculars? This will ensure that I can list all of my honors
COLUMBIA: That is fine. You may also want to list them briefly on that page as well.