As long as you get the form DS-20 19 at the same time, you can sign in the same window as a husband and wife. This is allowed and will not be rejected because you sign at the same time. As for the investigation, as long as the materials are true, don't worry. Suggest going to the interview at the same time!

The endorsement of the United States on passports or other travel documents held by domestic or foreign citizens indicates that the holders are allowed to apply for entry into the United States, which can also be said to be the endorsement certificate issued to them. American visas can be divided into two categories: immigrant visas and non-immigrant visas, and each category can be divided into many subcategories.

Holding an American visa may not be successful in entering the United States, and the US Customs and Border Protection (CBP) will finally decide to grant the port entry rights.

Extended data:

From February 13, 2065438, some eligible non-immigrant visa applicants are allowed to be exempted from the interview if their previous visas are renewed within 48 months (4 years) and the visa type is the same as last time.

In China, holders of B (temporary business and tourist visitors), C 1 (transit), D (crew), F (students), J (exchange visits), M (non-academic students) and O (special talents) can renew their visas according to this plan if they meet the requirements.

Baidu Encyclopedia-American Visa