I have wrongly select b1/b2 both but going for a convocation does it create any problem

The appointment of visa interview has confirmed but while filling the ds-160 form I have done 2 mistakes. One I have selected b1/ b2 both but am going for convocation of my son and the second one the intended date of arrival l selected December 10th but my visa interview is on 22nd December. Can anyone assist me in right way what to do ASAP plz…

You can call the us travel docs office and ask them to fix it for you. If not, you can still request the officer at the consulate to make the changes when appearing for interview.