I submitted a DS-160 (U.S. Online Nonimmigrant Visa Application) and received a confirmation and a barcode, but then wasn't able to make a payment because an error message said my barcode was already taken. However, I was forwarded to the page where I retrieve my DS-160. I continued and received a new confirmation and a new barcode, but this time I was able to make the payment and receive my instruction sheet along with the last barcode on it.
Do I need to take both confirmation pages with me to the interview?
On my instruction sheet I also made a mistake and entered my surnames twice, for example, John Matthew Brown Brown. Will this affect my interview?