Do you guys have any ideas?
Your acceptance rate is the same as anyone else who got deferred or is applying regular decision.
you need continuing show your strong interest with a letter by email to your regional advisor at Columbia, in order to get yourself up in RD applicants pool.
What that mean by deferred? simply admission people at Columbia want to see you more in the remaining of your senior year in high school. Perhaps, any information that you might still not summit in the first place , or what is your plan in the remaining high school year and so on ? you must present yourself by email one more time to the advisor at Columbia. Hopefully, those extra work might assist get a seat that you hope for. Don’t worry about it , no rejection without trying and with no doubt, you got to trust you all deferred still are the best!