Should i still apply to Columbia? plz the more anwers the better?

No. Schools, especially those like Columbia which get all the applicants they need, stick to their deadlines scrupulously. They wouldn't look at your application at all if the deadline has ped. Occasionally a school will extend a deadline a few hours because of a hardship of some sort, but never by two weeks, and certainly not because you were busy applying for other schools.