Hello to all!
I hope I am in the forum....I have a concern with regard to my US Visa Application. I have filled-out and submitted the DS-160 Form.  My schedule for interview is on April 23 and travel date is on May 15.  I made a mistake on my Visa type.  Instead of B1 for business, i erroneously clicked the B1/B2 (business/personal).  I have no relatives in the US and I am travelling strictly for business (training in our corporate office).  I will stay in the US maximum 3 days only.  Will this pose as a major problem?  I wanted to create a new form but cannot risk to cancel my existing schedule. It took me days to get the schedule. 
Is it advisable to create a new form and schedule new appointment and then cancel my previous form and existing schedule after I get a new date?  Or should I just leave the form as is and explain/mention the mistake during the interview?  PLEASE HELP!